Index: node_modules/d3-polygon/dist/d3-polygon.js
===================================================================
--- node_modules/d3-polygon/dist/d3-polygon.js	(revision e4c61dd6cd86e06265bc2bd91adba84a0f04044a)
+++ node_modules/d3-polygon/dist/d3-polygon.js	(revision e4c61dd6cd86e06265bc2bd91adba84a0f04044a)
@@ -0,0 +1,150 @@
+// https://d3js.org/d3-polygon/ v3.0.1 Copyright 2010-2021 Mike Bostock
+(function (global, factory) {
+typeof exports === 'object' && typeof module !== 'undefined' ? factory(exports) :
+typeof define === 'function' && define.amd ? define(['exports'], factory) :
+(global = typeof globalThis !== 'undefined' ? globalThis : global || self, factory(global.d3 = global.d3 || {}));
+}(this, (function (exports) { 'use strict';
+
+function area(polygon) {
+  var i = -1,
+      n = polygon.length,
+      a,
+      b = polygon[n - 1],
+      area = 0;
+
+  while (++i < n) {
+    a = b;
+    b = polygon[i];
+    area += a[1] * b[0] - a[0] * b[1];
+  }
+
+  return area / 2;
+}
+
+function centroid(polygon) {
+  var i = -1,
+      n = polygon.length,
+      x = 0,
+      y = 0,
+      a,
+      b = polygon[n - 1],
+      c,
+      k = 0;
+
+  while (++i < n) {
+    a = b;
+    b = polygon[i];
+    k += c = a[0] * b[1] - b[0] * a[1];
+    x += (a[0] + b[0]) * c;
+    y += (a[1] + b[1]) * c;
+  }
+
+  return k *= 3, [x / k, y / k];
+}
+
+// Returns the 2D cross product of AB and AC vectors, i.e., the z-component of
+// the 3D cross product in a quadrant I Cartesian coordinate system (+x is
+// right, +y is up). Returns a positive value if ABC is counter-clockwise,
+// negative if clockwise, and zero if the points are collinear.
+function cross(a, b, c) {
+  return (b[0] - a[0]) * (c[1] - a[1]) - (b[1] - a[1]) * (c[0] - a[0]);
+}
+
+function lexicographicOrder(a, b) {
+  return a[0] - b[0] || a[1] - b[1];
+}
+
+// Computes the upper convex hull per the monotone chain algorithm.
+// Assumes points.length >= 3, is sorted by x, unique in y.
+// Returns an array of indices into points in left-to-right order.
+function computeUpperHullIndexes(points) {
+  const n = points.length,
+      indexes = [0, 1];
+  let size = 2, i;
+
+  for (i = 2; i < n; ++i) {
+    while (size > 1 && cross(points[indexes[size - 2]], points[indexes[size - 1]], points[i]) <= 0) --size;
+    indexes[size++] = i;
+  }
+
+  return indexes.slice(0, size); // remove popped points
+}
+
+function hull(points) {
+  if ((n = points.length) < 3) return null;
+
+  var i,
+      n,
+      sortedPoints = new Array(n),
+      flippedPoints = new Array(n);
+
+  for (i = 0; i < n; ++i) sortedPoints[i] = [+points[i][0], +points[i][1], i];
+  sortedPoints.sort(lexicographicOrder);
+  for (i = 0; i < n; ++i) flippedPoints[i] = [sortedPoints[i][0], -sortedPoints[i][1]];
+
+  var upperIndexes = computeUpperHullIndexes(sortedPoints),
+      lowerIndexes = computeUpperHullIndexes(flippedPoints);
+
+  // Construct the hull polygon, removing possible duplicate endpoints.
+  var skipLeft = lowerIndexes[0] === upperIndexes[0],
+      skipRight = lowerIndexes[lowerIndexes.length - 1] === upperIndexes[upperIndexes.length - 1],
+      hull = [];
+
+  // Add upper hull in right-to-l order.
+  // Then add lower hull in left-to-right order.
+  for (i = upperIndexes.length - 1; i >= 0; --i) hull.push(points[sortedPoints[upperIndexes[i]][2]]);
+  for (i = +skipLeft; i < lowerIndexes.length - skipRight; ++i) hull.push(points[sortedPoints[lowerIndexes[i]][2]]);
+
+  return hull;
+}
+
+function contains(polygon, point) {
+  var n = polygon.length,
+      p = polygon[n - 1],
+      x = point[0], y = point[1],
+      x0 = p[0], y0 = p[1],
+      x1, y1,
+      inside = false;
+
+  for (var i = 0; i < n; ++i) {
+    p = polygon[i], x1 = p[0], y1 = p[1];
+    if (((y1 > y) !== (y0 > y)) && (x < (x0 - x1) * (y - y1) / (y0 - y1) + x1)) inside = !inside;
+    x0 = x1, y0 = y1;
+  }
+
+  return inside;
+}
+
+function length(polygon) {
+  var i = -1,
+      n = polygon.length,
+      b = polygon[n - 1],
+      xa,
+      ya,
+      xb = b[0],
+      yb = b[1],
+      perimeter = 0;
+
+  while (++i < n) {
+    xa = xb;
+    ya = yb;
+    b = polygon[i];
+    xb = b[0];
+    yb = b[1];
+    xa -= xb;
+    ya -= yb;
+    perimeter += Math.hypot(xa, ya);
+  }
+
+  return perimeter;
+}
+
+exports.polygonArea = area;
+exports.polygonCentroid = centroid;
+exports.polygonContains = contains;
+exports.polygonHull = hull;
+exports.polygonLength = length;
+
+Object.defineProperty(exports, '__esModule', { value: true });
+
+})));
Index: node_modules/d3-polygon/dist/d3-polygon.min.js
===================================================================
--- node_modules/d3-polygon/dist/d3-polygon.min.js	(revision e4c61dd6cd86e06265bc2bd91adba84a0f04044a)
+++ node_modules/d3-polygon/dist/d3-polygon.min.js	(revision e4c61dd6cd86e06265bc2bd91adba84a0f04044a)
@@ -0,0 +1,2 @@
+// https://d3js.org/d3-polygon/ v3.0.1 Copyright 2010-2021 Mike Bostock
+!function(n,e){"object"==typeof exports&&"undefined"!=typeof module?e(exports):"function"==typeof define&&define.amd?define(["exports"],e):e((n="undefined"!=typeof globalThis?globalThis:n||self).d3=n.d3||{})}(this,(function(n){"use strict";function e(n,e){return n[0]-e[0]||n[1]-e[1]}function t(n){const e=n.length,t=[0,1];let o,r=2;for(o=2;o<e;++o){for(;r>1&&(f=n[t[r-2]],l=n[t[r-1]],u=n[o],(l[0]-f[0])*(u[1]-f[1])-(l[1]-f[1])*(u[0]-f[0])<=0);)--r;t[r++]=o}var f,l,u;return t.slice(0,r)}n.polygonArea=function(n){for(var e,t=-1,o=n.length,r=n[o-1],f=0;++t<o;)e=r,r=n[t],f+=e[1]*r[0]-e[0]*r[1];return f/2},n.polygonCentroid=function(n){for(var e,t,o=-1,r=n.length,f=0,l=0,u=n[r-1],i=0;++o<r;)e=u,u=n[o],i+=t=e[0]*u[1]-u[0]*e[1],f+=(e[0]+u[0])*t,l+=(e[1]+u[1])*t;return[f/(i*=3),l/i]},n.polygonContains=function(n,e){for(var t,o,r=n.length,f=n[r-1],l=e[0],u=e[1],i=f[0],g=f[1],h=!1,a=0;a<r;++a)t=(f=n[a])[0],(o=f[1])>u!=g>u&&l<(i-t)*(u-o)/(g-o)+t&&(h=!h),i=t,g=o;return h},n.polygonHull=function(n){if((r=n.length)<3)return null;var o,r,f=new Array(r),l=new Array(r);for(o=0;o<r;++o)f[o]=[+n[o][0],+n[o][1],o];for(f.sort(e),o=0;o<r;++o)l[o]=[f[o][0],-f[o][1]];var u=t(f),i=t(l),g=i[0]===u[0],h=i[i.length-1]===u[u.length-1],a=[];for(o=u.length-1;o>=0;--o)a.push(n[f[u[o]][2]]);for(o=+g;o<i.length-h;++o)a.push(n[f[i[o]][2]]);return a},n.polygonLength=function(n){for(var e,t,o=-1,r=n.length,f=n[r-1],l=f[0],u=f[1],i=0;++o<r;)e=l,t=u,e-=l=(f=n[o])[0],t-=u=f[1],i+=Math.hypot(e,t);return i},Object.defineProperty(n,"__esModule",{value:!0})}));