Index: node_modules/postcss-value-parser/lib/unit.js
===================================================================
--- node_modules/postcss-value-parser/lib/unit.js	(revision 2058e5c694bb6097866a5fe6503c519e8f74970f)
+++ node_modules/postcss-value-parser/lib/unit.js	(revision 2058e5c694bb6097866a5fe6503c519e8f74970f)
@@ -0,0 +1,120 @@
+var minus = "-".charCodeAt(0);
+var plus = "+".charCodeAt(0);
+var dot = ".".charCodeAt(0);
+var exp = "e".charCodeAt(0);
+var EXP = "E".charCodeAt(0);
+
+// Check if three code points would start a number
+// https://www.w3.org/TR/css-syntax-3/#starts-with-a-number
+function likeNumber(value) {
+  var code = value.charCodeAt(0);
+  var nextCode;
+
+  if (code === plus || code === minus) {
+    nextCode = value.charCodeAt(1);
+
+    if (nextCode >= 48 && nextCode <= 57) {
+      return true;
+    }
+
+    var nextNextCode = value.charCodeAt(2);
+
+    if (nextCode === dot && nextNextCode >= 48 && nextNextCode <= 57) {
+      return true;
+    }
+
+    return false;
+  }
+
+  if (code === dot) {
+    nextCode = value.charCodeAt(1);
+
+    if (nextCode >= 48 && nextCode <= 57) {
+      return true;
+    }
+
+    return false;
+  }
+
+  if (code >= 48 && code <= 57) {
+    return true;
+  }
+
+  return false;
+}
+
+// Consume a number
+// https://www.w3.org/TR/css-syntax-3/#consume-number
+module.exports = function(value) {
+  var pos = 0;
+  var length = value.length;
+  var code;
+  var nextCode;
+  var nextNextCode;
+
+  if (length === 0 || !likeNumber(value)) {
+    return false;
+  }
+
+  code = value.charCodeAt(pos);
+
+  if (code === plus || code === minus) {
+    pos++;
+  }
+
+  while (pos < length) {
+    code = value.charCodeAt(pos);
+
+    if (code < 48 || code > 57) {
+      break;
+    }
+
+    pos += 1;
+  }
+
+  code = value.charCodeAt(pos);
+  nextCode = value.charCodeAt(pos + 1);
+
+  if (code === dot && nextCode >= 48 && nextCode <= 57) {
+    pos += 2;
+
+    while (pos < length) {
+      code = value.charCodeAt(pos);
+
+      if (code < 48 || code > 57) {
+        break;
+      }
+
+      pos += 1;
+    }
+  }
+
+  code = value.charCodeAt(pos);
+  nextCode = value.charCodeAt(pos + 1);
+  nextNextCode = value.charCodeAt(pos + 2);
+
+  if (
+    (code === exp || code === EXP) &&
+    ((nextCode >= 48 && nextCode <= 57) ||
+      ((nextCode === plus || nextCode === minus) &&
+        nextNextCode >= 48 &&
+        nextNextCode <= 57))
+  ) {
+    pos += nextCode === plus || nextCode === minus ? 3 : 2;
+
+    while (pos < length) {
+      code = value.charCodeAt(pos);
+
+      if (code < 48 || code > 57) {
+        break;
+      }
+
+      pos += 1;
+    }
+  }
+
+  return {
+    number: value.slice(0, pos),
+    unit: value.slice(pos)
+  };
+};