Index: node_modules/d3-interpolate/src/array.js
===================================================================
--- node_modules/d3-interpolate/src/array.js	(revision e4c61dd6cd86e06265bc2bd91adba84a0f04044a)
+++ node_modules/d3-interpolate/src/array.js	(revision e4c61dd6cd86e06265bc2bd91adba84a0f04044a)
@@ -0,0 +1,22 @@
+import value from "./value.js";
+import numberArray, {isNumberArray} from "./numberArray.js";
+
+export default function(a, b) {
+  return (isNumberArray(b) ? numberArray : genericArray)(a, b);
+}
+
+export function genericArray(a, b) {
+  var nb = b ? b.length : 0,
+      na = a ? Math.min(nb, a.length) : 0,
+      x = new Array(na),
+      c = new Array(nb),
+      i;
+
+  for (i = 0; i < na; ++i) x[i] = value(a[i], b[i]);
+  for (; i < nb; ++i) c[i] = b[i];
+
+  return function(t) {
+    for (i = 0; i < na; ++i) c[i] = x[i](t);
+    return c;
+  };
+}
Index: node_modules/d3-interpolate/src/basis.js
===================================================================
--- node_modules/d3-interpolate/src/basis.js	(revision e4c61dd6cd86e06265bc2bd91adba84a0f04044a)
+++ node_modules/d3-interpolate/src/basis.js	(revision e4c61dd6cd86e06265bc2bd91adba84a0f04044a)
@@ -0,0 +1,19 @@
+export function basis(t1, v0, v1, v2, v3) {
+  var t2 = t1 * t1, t3 = t2 * t1;
+  return ((1 - 3 * t1 + 3 * t2 - t3) * v0
+      + (4 - 6 * t2 + 3 * t3) * v1
+      + (1 + 3 * t1 + 3 * t2 - 3 * t3) * v2
+      + t3 * v3) / 6;
+}
+
+export default function(values) {
+  var n = values.length - 1;
+  return function(t) {
+    var i = t <= 0 ? (t = 0) : t >= 1 ? (t = 1, n - 1) : Math.floor(t * n),
+        v1 = values[i],
+        v2 = values[i + 1],
+        v0 = i > 0 ? values[i - 1] : 2 * v1 - v2,
+        v3 = i < n - 1 ? values[i + 2] : 2 * v2 - v1;
+    return basis((t - i / n) * n, v0, v1, v2, v3);
+  };
+}
Index: node_modules/d3-interpolate/src/basisClosed.js
===================================================================
--- node_modules/d3-interpolate/src/basisClosed.js	(revision e4c61dd6cd86e06265bc2bd91adba84a0f04044a)
+++ node_modules/d3-interpolate/src/basisClosed.js	(revision e4c61dd6cd86e06265bc2bd91adba84a0f04044a)
@@ -0,0 +1,13 @@
+import {basis} from "./basis.js";
+
+export default function(values) {
+  var n = values.length;
+  return function(t) {
+    var i = Math.floor(((t %= 1) < 0 ? ++t : t) * n),
+        v0 = values[(i + n - 1) % n],
+        v1 = values[i % n],
+        v2 = values[(i + 1) % n],
+        v3 = values[(i + 2) % n];
+    return basis((t - i / n) * n, v0, v1, v2, v3);
+  };
+}
Index: node_modules/d3-interpolate/src/color.js
===================================================================
--- node_modules/d3-interpolate/src/color.js	(revision e4c61dd6cd86e06265bc2bd91adba84a0f04044a)
+++ node_modules/d3-interpolate/src/color.js	(revision e4c61dd6cd86e06265bc2bd91adba84a0f04044a)
@@ -0,0 +1,29 @@
+import constant from "./constant.js";
+
+function linear(a, d) {
+  return function(t) {
+    return a + t * d;
+  };
+}
+
+function exponential(a, b, y) {
+  return a = Math.pow(a, y), b = Math.pow(b, y) - a, y = 1 / y, function(t) {
+    return Math.pow(a + t * b, y);
+  };
+}
+
+export function hue(a, b) {
+  var d = b - a;
+  return d ? linear(a, d > 180 || d < -180 ? d - 360 * Math.round(d / 360) : d) : constant(isNaN(a) ? b : a);
+}
+
+export function gamma(y) {
+  return (y = +y) === 1 ? nogamma : function(a, b) {
+    return b - a ? exponential(a, b, y) : constant(isNaN(a) ? b : a);
+  };
+}
+
+export default function nogamma(a, b) {
+  var d = b - a;
+  return d ? linear(a, d) : constant(isNaN(a) ? b : a);
+}
Index: node_modules/d3-interpolate/src/constant.js
===================================================================
--- node_modules/d3-interpolate/src/constant.js	(revision e4c61dd6cd86e06265bc2bd91adba84a0f04044a)
+++ node_modules/d3-interpolate/src/constant.js	(revision e4c61dd6cd86e06265bc2bd91adba84a0f04044a)
@@ -0,0 +1,1 @@
+export default x => () => x;
Index: node_modules/d3-interpolate/src/cubehelix.js
===================================================================
--- node_modules/d3-interpolate/src/cubehelix.js	(revision e4c61dd6cd86e06265bc2bd91adba84a0f04044a)
+++ node_modules/d3-interpolate/src/cubehelix.js	(revision e4c61dd6cd86e06265bc2bd91adba84a0f04044a)
@@ -0,0 +1,29 @@
+import {cubehelix as colorCubehelix} from "d3-color";
+import color, {hue} from "./color.js";
+
+function cubehelix(hue) {
+  return (function cubehelixGamma(y) {
+    y = +y;
+
+    function cubehelix(start, end) {
+      var h = hue((start = colorCubehelix(start)).h, (end = colorCubehelix(end)).h),
+          s = color(start.s, end.s),
+          l = color(start.l, end.l),
+          opacity = color(start.opacity, end.opacity);
+      return function(t) {
+        start.h = h(t);
+        start.s = s(t);
+        start.l = l(Math.pow(t, y));
+        start.opacity = opacity(t);
+        return start + "";
+      };
+    }
+
+    cubehelix.gamma = cubehelixGamma;
+
+    return cubehelix;
+  })(1);
+}
+
+export default cubehelix(hue);
+export var cubehelixLong = cubehelix(color);
Index: node_modules/d3-interpolate/src/date.js
===================================================================
--- node_modules/d3-interpolate/src/date.js	(revision e4c61dd6cd86e06265bc2bd91adba84a0f04044a)
+++ node_modules/d3-interpolate/src/date.js	(revision e4c61dd6cd86e06265bc2bd91adba84a0f04044a)
@@ -0,0 +1,6 @@
+export default function(a, b) {
+  var d = new Date;
+  return a = +a, b = +b, function(t) {
+    return d.setTime(a * (1 - t) + b * t), d;
+  };
+}
Index: node_modules/d3-interpolate/src/discrete.js
===================================================================
--- node_modules/d3-interpolate/src/discrete.js	(revision e4c61dd6cd86e06265bc2bd91adba84a0f04044a)
+++ node_modules/d3-interpolate/src/discrete.js	(revision e4c61dd6cd86e06265bc2bd91adba84a0f04044a)
@@ -0,0 +1,6 @@
+export default function(range) {
+  var n = range.length;
+  return function(t) {
+    return range[Math.max(0, Math.min(n - 1, Math.floor(t * n)))];
+  };
+}
Index: node_modules/d3-interpolate/src/hcl.js
===================================================================
--- node_modules/d3-interpolate/src/hcl.js	(revision e4c61dd6cd86e06265bc2bd91adba84a0f04044a)
+++ node_modules/d3-interpolate/src/hcl.js	(revision e4c61dd6cd86e06265bc2bd91adba84a0f04044a)
@@ -0,0 +1,21 @@
+import {hcl as colorHcl} from "d3-color";
+import color, {hue} from "./color.js";
+
+function hcl(hue) {
+  return function(start, end) {
+    var h = hue((start = colorHcl(start)).h, (end = colorHcl(end)).h),
+        c = color(start.c, end.c),
+        l = color(start.l, end.l),
+        opacity = color(start.opacity, end.opacity);
+    return function(t) {
+      start.h = h(t);
+      start.c = c(t);
+      start.l = l(t);
+      start.opacity = opacity(t);
+      return start + "";
+    };
+  }
+}
+
+export default hcl(hue);
+export var hclLong = hcl(color);
Index: node_modules/d3-interpolate/src/hsl.js
===================================================================
--- node_modules/d3-interpolate/src/hsl.js	(revision e4c61dd6cd86e06265bc2bd91adba84a0f04044a)
+++ node_modules/d3-interpolate/src/hsl.js	(revision e4c61dd6cd86e06265bc2bd91adba84a0f04044a)
@@ -0,0 +1,21 @@
+import {hsl as colorHsl} from "d3-color";
+import color, {hue} from "./color.js";
+
+function hsl(hue) {
+  return function(start, end) {
+    var h = hue((start = colorHsl(start)).h, (end = colorHsl(end)).h),
+        s = color(start.s, end.s),
+        l = color(start.l, end.l),
+        opacity = color(start.opacity, end.opacity);
+    return function(t) {
+      start.h = h(t);
+      start.s = s(t);
+      start.l = l(t);
+      start.opacity = opacity(t);
+      return start + "";
+    };
+  }
+}
+
+export default hsl(hue);
+export var hslLong = hsl(color);
Index: node_modules/d3-interpolate/src/hue.js
===================================================================
--- node_modules/d3-interpolate/src/hue.js	(revision e4c61dd6cd86e06265bc2bd91adba84a0f04044a)
+++ node_modules/d3-interpolate/src/hue.js	(revision e4c61dd6cd86e06265bc2bd91adba84a0f04044a)
@@ -0,0 +1,9 @@
+import {hue} from "./color.js";
+
+export default function(a, b) {
+  var i = hue(+a, +b);
+  return function(t) {
+    var x = i(t);
+    return x - 360 * Math.floor(x / 360);
+  };
+}
Index: node_modules/d3-interpolate/src/index.js
===================================================================
--- node_modules/d3-interpolate/src/index.js	(revision e4c61dd6cd86e06265bc2bd91adba84a0f04044a)
+++ node_modules/d3-interpolate/src/index.js	(revision e4c61dd6cd86e06265bc2bd91adba84a0f04044a)
@@ -0,0 +1,21 @@
+export {default as interpolate} from "./value.js";
+export {default as interpolateArray} from "./array.js";
+export {default as interpolateBasis} from "./basis.js";
+export {default as interpolateBasisClosed} from "./basisClosed.js";
+export {default as interpolateDate} from "./date.js";
+export {default as interpolateDiscrete} from "./discrete.js";
+export {default as interpolateHue} from "./hue.js";
+export {default as interpolateNumber} from "./number.js";
+export {default as interpolateNumberArray} from "./numberArray.js";
+export {default as interpolateObject} from "./object.js";
+export {default as interpolateRound} from "./round.js";
+export {default as interpolateString} from "./string.js";
+export {interpolateTransformCss, interpolateTransformSvg} from "./transform/index.js";
+export {default as interpolateZoom} from "./zoom.js";
+export {default as interpolateRgb, rgbBasis as interpolateRgbBasis, rgbBasisClosed as interpolateRgbBasisClosed} from "./rgb.js";
+export {default as interpolateHsl, hslLong as interpolateHslLong} from "./hsl.js";
+export {default as interpolateLab} from "./lab.js";
+export {default as interpolateHcl, hclLong as interpolateHclLong} from "./hcl.js";
+export {default as interpolateCubehelix, cubehelixLong as interpolateCubehelixLong} from "./cubehelix.js";
+export {default as piecewise} from "./piecewise.js";
+export {default as quantize} from "./quantize.js";
Index: node_modules/d3-interpolate/src/lab.js
===================================================================
--- node_modules/d3-interpolate/src/lab.js	(revision e4c61dd6cd86e06265bc2bd91adba84a0f04044a)
+++ node_modules/d3-interpolate/src/lab.js	(revision e4c61dd6cd86e06265bc2bd91adba84a0f04044a)
@@ -0,0 +1,16 @@
+import {lab as colorLab} from "d3-color";
+import color from "./color.js";
+
+export default function lab(start, end) {
+  var l = color((start = colorLab(start)).l, (end = colorLab(end)).l),
+      a = color(start.a, end.a),
+      b = color(start.b, end.b),
+      opacity = color(start.opacity, end.opacity);
+  return function(t) {
+    start.l = l(t);
+    start.a = a(t);
+    start.b = b(t);
+    start.opacity = opacity(t);
+    return start + "";
+  };
+}
Index: node_modules/d3-interpolate/src/number.js
===================================================================
--- node_modules/d3-interpolate/src/number.js	(revision e4c61dd6cd86e06265bc2bd91adba84a0f04044a)
+++ node_modules/d3-interpolate/src/number.js	(revision e4c61dd6cd86e06265bc2bd91adba84a0f04044a)
@@ -0,0 +1,5 @@
+export default function(a, b) {
+  return a = +a, b = +b, function(t) {
+    return a * (1 - t) + b * t;
+  };
+}
Index: node_modules/d3-interpolate/src/numberArray.js
===================================================================
--- node_modules/d3-interpolate/src/numberArray.js	(revision e4c61dd6cd86e06265bc2bd91adba84a0f04044a)
+++ node_modules/d3-interpolate/src/numberArray.js	(revision e4c61dd6cd86e06265bc2bd91adba84a0f04044a)
@@ -0,0 +1,14 @@
+export default function(a, b) {
+  if (!b) b = [];
+  var n = a ? Math.min(b.length, a.length) : 0,
+      c = b.slice(),
+      i;
+  return function(t) {
+    for (i = 0; i < n; ++i) c[i] = a[i] * (1 - t) + b[i] * t;
+    return c;
+  };
+}
+
+export function isNumberArray(x) {
+  return ArrayBuffer.isView(x) && !(x instanceof DataView);
+}
Index: node_modules/d3-interpolate/src/object.js
===================================================================
--- node_modules/d3-interpolate/src/object.js	(revision e4c61dd6cd86e06265bc2bd91adba84a0f04044a)
+++ node_modules/d3-interpolate/src/object.js	(revision e4c61dd6cd86e06265bc2bd91adba84a0f04044a)
@@ -0,0 +1,23 @@
+import value from "./value.js";
+
+export default function(a, b) {
+  var i = {},
+      c = {},
+      k;
+
+  if (a === null || typeof a !== "object") a = {};
+  if (b === null || typeof b !== "object") b = {};
+
+  for (k in b) {
+    if (k in a) {
+      i[k] = value(a[k], b[k]);
+    } else {
+      c[k] = b[k];
+    }
+  }
+
+  return function(t) {
+    for (k in i) c[k] = i[k](t);
+    return c;
+  };
+}
Index: node_modules/d3-interpolate/src/piecewise.js
===================================================================
--- node_modules/d3-interpolate/src/piecewise.js	(revision e4c61dd6cd86e06265bc2bd91adba84a0f04044a)
+++ node_modules/d3-interpolate/src/piecewise.js	(revision e4c61dd6cd86e06265bc2bd91adba84a0f04044a)
@@ -0,0 +1,11 @@
+import {default as value} from "./value.js";
+
+export default function piecewise(interpolate, values) {
+  if (values === undefined) values = interpolate, interpolate = value;
+  var i = 0, n = values.length - 1, v = values[0], I = new Array(n < 0 ? 0 : n);
+  while (i < n) I[i] = interpolate(v, v = values[++i]);
+  return function(t) {
+    var i = Math.max(0, Math.min(n - 1, Math.floor(t *= n)));
+    return I[i](t - i);
+  };
+}
Index: node_modules/d3-interpolate/src/quantize.js
===================================================================
--- node_modules/d3-interpolate/src/quantize.js	(revision e4c61dd6cd86e06265bc2bd91adba84a0f04044a)
+++ node_modules/d3-interpolate/src/quantize.js	(revision e4c61dd6cd86e06265bc2bd91adba84a0f04044a)
@@ -0,0 +1,5 @@
+export default function(interpolator, n) {
+  var samples = new Array(n);
+  for (var i = 0; i < n; ++i) samples[i] = interpolator(i / (n - 1));
+  return samples;
+}
Index: node_modules/d3-interpolate/src/rgb.js
===================================================================
--- node_modules/d3-interpolate/src/rgb.js	(revision e4c61dd6cd86e06265bc2bd91adba84a0f04044a)
+++ node_modules/d3-interpolate/src/rgb.js	(revision e4c61dd6cd86e06265bc2bd91adba84a0f04044a)
@@ -0,0 +1,55 @@
+import {rgb as colorRgb} from "d3-color";
+import basis from "./basis.js";
+import basisClosed from "./basisClosed.js";
+import nogamma, {gamma} from "./color.js";
+
+export default (function rgbGamma(y) {
+  var color = gamma(y);
+
+  function rgb(start, end) {
+    var r = color((start = colorRgb(start)).r, (end = colorRgb(end)).r),
+        g = color(start.g, end.g),
+        b = color(start.b, end.b),
+        opacity = nogamma(start.opacity, end.opacity);
+    return function(t) {
+      start.r = r(t);
+      start.g = g(t);
+      start.b = b(t);
+      start.opacity = opacity(t);
+      return start + "";
+    };
+  }
+
+  rgb.gamma = rgbGamma;
+
+  return rgb;
+})(1);
+
+function rgbSpline(spline) {
+  return function(colors) {
+    var n = colors.length,
+        r = new Array(n),
+        g = new Array(n),
+        b = new Array(n),
+        i, color;
+    for (i = 0; i < n; ++i) {
+      color = colorRgb(colors[i]);
+      r[i] = color.r || 0;
+      g[i] = color.g || 0;
+      b[i] = color.b || 0;
+    }
+    r = spline(r);
+    g = spline(g);
+    b = spline(b);
+    color.opacity = 1;
+    return function(t) {
+      color.r = r(t);
+      color.g = g(t);
+      color.b = b(t);
+      return color + "";
+    };
+  };
+}
+
+export var rgbBasis = rgbSpline(basis);
+export var rgbBasisClosed = rgbSpline(basisClosed);
Index: node_modules/d3-interpolate/src/round.js
===================================================================
--- node_modules/d3-interpolate/src/round.js	(revision e4c61dd6cd86e06265bc2bd91adba84a0f04044a)
+++ node_modules/d3-interpolate/src/round.js	(revision e4c61dd6cd86e06265bc2bd91adba84a0f04044a)
@@ -0,0 +1,5 @@
+export default function(a, b) {
+  return a = +a, b = +b, function(t) {
+    return Math.round(a * (1 - t) + b * t);
+  };
+}
Index: node_modules/d3-interpolate/src/string.js
===================================================================
--- node_modules/d3-interpolate/src/string.js	(revision e4c61dd6cd86e06265bc2bd91adba84a0f04044a)
+++ node_modules/d3-interpolate/src/string.js	(revision e4c61dd6cd86e06265bc2bd91adba84a0f04044a)
@@ -0,0 +1,64 @@
+import number from "./number.js";
+
+var reA = /[-+]?(?:\d+\.?\d*|\.?\d+)(?:[eE][-+]?\d+)?/g,
+    reB = new RegExp(reA.source, "g");
+
+function zero(b) {
+  return function() {
+    return b;
+  };
+}
+
+function one(b) {
+  return function(t) {
+    return b(t) + "";
+  };
+}
+
+export default function(a, b) {
+  var bi = reA.lastIndex = reB.lastIndex = 0, // scan index for next number in b
+      am, // current match in a
+      bm, // current match in b
+      bs, // string preceding current number in b, if any
+      i = -1, // index in s
+      s = [], // string constants and placeholders
+      q = []; // number interpolators
+
+  // Coerce inputs to strings.
+  a = a + "", b = b + "";
+
+  // Interpolate pairs of numbers in a & b.
+  while ((am = reA.exec(a))
+      && (bm = reB.exec(b))) {
+    if ((bs = bm.index) > bi) { // a string precedes the next number in b
+      bs = b.slice(bi, bs);
+      if (s[i]) s[i] += bs; // coalesce with previous string
+      else s[++i] = bs;
+    }
+    if ((am = am[0]) === (bm = bm[0])) { // numbers in a & b match
+      if (s[i]) s[i] += bm; // coalesce with previous string
+      else s[++i] = bm;
+    } else { // interpolate non-matching numbers
+      s[++i] = null;
+      q.push({i: i, x: number(am, bm)});
+    }
+    bi = reB.lastIndex;
+  }
+
+  // Add remains of b.
+  if (bi < b.length) {
+    bs = b.slice(bi);
+    if (s[i]) s[i] += bs; // coalesce with previous string
+    else s[++i] = bs;
+  }
+
+  // Special optimization for only a single match.
+  // Otherwise, interpolate each of the numbers and rejoin the string.
+  return s.length < 2 ? (q[0]
+      ? one(q[0].x)
+      : zero(b))
+      : (b = q.length, function(t) {
+          for (var i = 0, o; i < b; ++i) s[(o = q[i]).i] = o.x(t);
+          return s.join("");
+        });
+}
Index: node_modules/d3-interpolate/src/transform/decompose.js
===================================================================
--- node_modules/d3-interpolate/src/transform/decompose.js	(revision e4c61dd6cd86e06265bc2bd91adba84a0f04044a)
+++ node_modules/d3-interpolate/src/transform/decompose.js	(revision e4c61dd6cd86e06265bc2bd91adba84a0f04044a)
@@ -0,0 +1,26 @@
+var degrees = 180 / Math.PI;
+
+export var identity = {
+  translateX: 0,
+  translateY: 0,
+  rotate: 0,
+  skewX: 0,
+  scaleX: 1,
+  scaleY: 1
+};
+
+export default function(a, b, c, d, e, f) {
+  var scaleX, scaleY, skewX;
+  if (scaleX = Math.sqrt(a * a + b * b)) a /= scaleX, b /= scaleX;
+  if (skewX = a * c + b * d) c -= a * skewX, d -= b * skewX;
+  if (scaleY = Math.sqrt(c * c + d * d)) c /= scaleY, d /= scaleY, skewX /= scaleY;
+  if (a * d < b * c) a = -a, b = -b, skewX = -skewX, scaleX = -scaleX;
+  return {
+    translateX: e,
+    translateY: f,
+    rotate: Math.atan2(b, a) * degrees,
+    skewX: Math.atan(skewX) * degrees,
+    scaleX: scaleX,
+    scaleY: scaleY
+  };
+}
Index: node_modules/d3-interpolate/src/transform/index.js
===================================================================
--- node_modules/d3-interpolate/src/transform/index.js	(revision e4c61dd6cd86e06265bc2bd91adba84a0f04044a)
+++ node_modules/d3-interpolate/src/transform/index.js	(revision e4c61dd6cd86e06265bc2bd91adba84a0f04044a)
@@ -0,0 +1,63 @@
+import number from "../number.js";
+import {parseCss, parseSvg} from "./parse.js";
+
+function interpolateTransform(parse, pxComma, pxParen, degParen) {
+
+  function pop(s) {
+    return s.length ? s.pop() + " " : "";
+  }
+
+  function translate(xa, ya, xb, yb, s, q) {
+    if (xa !== xb || ya !== yb) {
+      var i = s.push("translate(", null, pxComma, null, pxParen);
+      q.push({i: i - 4, x: number(xa, xb)}, {i: i - 2, x: number(ya, yb)});
+    } else if (xb || yb) {
+      s.push("translate(" + xb + pxComma + yb + pxParen);
+    }
+  }
+
+  function rotate(a, b, s, q) {
+    if (a !== b) {
+      if (a - b > 180) b += 360; else if (b - a > 180) a += 360; // shortest path
+      q.push({i: s.push(pop(s) + "rotate(", null, degParen) - 2, x: number(a, b)});
+    } else if (b) {
+      s.push(pop(s) + "rotate(" + b + degParen);
+    }
+  }
+
+  function skewX(a, b, s, q) {
+    if (a !== b) {
+      q.push({i: s.push(pop(s) + "skewX(", null, degParen) - 2, x: number(a, b)});
+    } else if (b) {
+      s.push(pop(s) + "skewX(" + b + degParen);
+    }
+  }
+
+  function scale(xa, ya, xb, yb, s, q) {
+    if (xa !== xb || ya !== yb) {
+      var i = s.push(pop(s) + "scale(", null, ",", null, ")");
+      q.push({i: i - 4, x: number(xa, xb)}, {i: i - 2, x: number(ya, yb)});
+    } else if (xb !== 1 || yb !== 1) {
+      s.push(pop(s) + "scale(" + xb + "," + yb + ")");
+    }
+  }
+
+  return function(a, b) {
+    var s = [], // string constants and placeholders
+        q = []; // number interpolators
+    a = parse(a), b = parse(b);
+    translate(a.translateX, a.translateY, b.translateX, b.translateY, s, q);
+    rotate(a.rotate, b.rotate, s, q);
+    skewX(a.skewX, b.skewX, s, q);
+    scale(a.scaleX, a.scaleY, b.scaleX, b.scaleY, s, q);
+    a = b = null; // gc
+    return function(t) {
+      var i = -1, n = q.length, o;
+      while (++i < n) s[(o = q[i]).i] = o.x(t);
+      return s.join("");
+    };
+  };
+}
+
+export var interpolateTransformCss = interpolateTransform(parseCss, "px, ", "px)", "deg)");
+export var interpolateTransformSvg = interpolateTransform(parseSvg, ", ", ")", ")");
Index: node_modules/d3-interpolate/src/transform/parse.js
===================================================================
--- node_modules/d3-interpolate/src/transform/parse.js	(revision e4c61dd6cd86e06265bc2bd91adba84a0f04044a)
+++ node_modules/d3-interpolate/src/transform/parse.js	(revision e4c61dd6cd86e06265bc2bd91adba84a0f04044a)
@@ -0,0 +1,18 @@
+import decompose, {identity} from "./decompose.js";
+
+var svgNode;
+
+/* eslint-disable no-undef */
+export function parseCss(value) {
+  const m = new (typeof DOMMatrix === "function" ? DOMMatrix : WebKitCSSMatrix)(value + "");
+  return m.isIdentity ? identity : decompose(m.a, m.b, m.c, m.d, m.e, m.f);
+}
+
+export function parseSvg(value) {
+  if (value == null) return identity;
+  if (!svgNode) svgNode = document.createElementNS("http://www.w3.org/2000/svg", "g");
+  svgNode.setAttribute("transform", value);
+  if (!(value = svgNode.transform.baseVal.consolidate())) return identity;
+  value = value.matrix;
+  return decompose(value.a, value.b, value.c, value.d, value.e, value.f);
+}
Index: node_modules/d3-interpolate/src/value.js
===================================================================
--- node_modules/d3-interpolate/src/value.js	(revision e4c61dd6cd86e06265bc2bd91adba84a0f04044a)
+++ node_modules/d3-interpolate/src/value.js	(revision e4c61dd6cd86e06265bc2bd91adba84a0f04044a)
@@ -0,0 +1,22 @@
+import {color} from "d3-color";
+import rgb from "./rgb.js";
+import {genericArray} from "./array.js";
+import date from "./date.js";
+import number from "./number.js";
+import object from "./object.js";
+import string from "./string.js";
+import constant from "./constant.js";
+import numberArray, {isNumberArray} from "./numberArray.js";
+
+export default function(a, b) {
+  var t = typeof b, c;
+  return b == null || t === "boolean" ? constant(b)
+      : (t === "number" ? number
+      : t === "string" ? ((c = color(b)) ? (b = c, rgb) : string)
+      : b instanceof color ? rgb
+      : b instanceof Date ? date
+      : isNumberArray(b) ? numberArray
+      : Array.isArray(b) ? genericArray
+      : typeof b.valueOf !== "function" && typeof b.toString !== "function" || isNaN(b) ? object
+      : number)(a, b);
+}
Index: node_modules/d3-interpolate/src/zoom.js
===================================================================
--- node_modules/d3-interpolate/src/zoom.js	(revision e4c61dd6cd86e06265bc2bd91adba84a0f04044a)
+++ node_modules/d3-interpolate/src/zoom.js	(revision e4c61dd6cd86e06265bc2bd91adba84a0f04044a)
@@ -0,0 +1,71 @@
+var epsilon2 = 1e-12;
+
+function cosh(x) {
+  return ((x = Math.exp(x)) + 1 / x) / 2;
+}
+
+function sinh(x) {
+  return ((x = Math.exp(x)) - 1 / x) / 2;
+}
+
+function tanh(x) {
+  return ((x = Math.exp(2 * x)) - 1) / (x + 1);
+}
+
+export default (function zoomRho(rho, rho2, rho4) {
+
+  // p0 = [ux0, uy0, w0]
+  // p1 = [ux1, uy1, w1]
+  function zoom(p0, p1) {
+    var ux0 = p0[0], uy0 = p0[1], w0 = p0[2],
+        ux1 = p1[0], uy1 = p1[1], w1 = p1[2],
+        dx = ux1 - ux0,
+        dy = uy1 - uy0,
+        d2 = dx * dx + dy * dy,
+        i,
+        S;
+
+    // Special case for u0 ≅ u1.
+    if (d2 < epsilon2) {
+      S = Math.log(w1 / w0) / rho;
+      i = function(t) {
+        return [
+          ux0 + t * dx,
+          uy0 + t * dy,
+          w0 * Math.exp(rho * t * S)
+        ];
+      }
+    }
+
+    // General case.
+    else {
+      var d1 = Math.sqrt(d2),
+          b0 = (w1 * w1 - w0 * w0 + rho4 * d2) / (2 * w0 * rho2 * d1),
+          b1 = (w1 * w1 - w0 * w0 - rho4 * d2) / (2 * w1 * rho2 * d1),
+          r0 = Math.log(Math.sqrt(b0 * b0 + 1) - b0),
+          r1 = Math.log(Math.sqrt(b1 * b1 + 1) - b1);
+      S = (r1 - r0) / rho;
+      i = function(t) {
+        var s = t * S,
+            coshr0 = cosh(r0),
+            u = w0 / (rho2 * d1) * (coshr0 * tanh(rho * s + r0) - sinh(r0));
+        return [
+          ux0 + u * dx,
+          uy0 + u * dy,
+          w0 * coshr0 / cosh(rho * s + r0)
+        ];
+      }
+    }
+
+    i.duration = S * 1000 * rho / Math.SQRT2;
+
+    return i;
+  }
+
+  zoom.rho = function(_) {
+    var _1 = Math.max(1e-3, +_), _2 = _1 * _1, _4 = _2 * _2;
+    return zoomRho(_1, _2, _4);
+  };
+
+  return zoom;
+})(Math.SQRT2, 2, 4);