chore: reduce deps size

Author: KuznetsovRoman

.eslintignore

@@ -1,2 +1,3 @@
 **/.*
+lib/vendor
 node_modules

lib/diff-clusters/clusters-joiner.js

@@ -1,7 +1,12 @@
 'use strict';
 
 const DiffArea = require('../diff-area');
-const jsgraphs = require('js-graph-algorithms');
+// https://www.npmjs.com/package/js-graph-algorithms
+// https://github.com/chen0040/js-graph-algorithms/blob/master/build/jsgraphs.min.js
+/**
+ * @type import('js-graph-algorithms')
+ */
+const jsgraphs = require('../vendor/jsgraphs.min.js');
 
 const hasOverlap = (cluster1, cluster2) => {
     if (cluster1.left > cluster2.right || cluster2.left > cluster1.right) {

lib/vendor/jsgraphs.min.js

@@ -10,7 +10,6 @@
   "dependencies": {
     "color-diff": "^1.1.0",
     "fs-extra": "^8.1.0",
-    "js-graph-algorithms": "1.0.18",
     "lodash": "^4.17.3",
     "nested-error-stacks": "^2.1.0",
     "parse-color": "^1.0.0",
@@ -23,6 +22,7 @@
     "eslint": "^5.3.0",
     "eslint-config-gemini-testing": "^3.0.0",
     "gm": "^1.23.1",
+    "js-graph-algorithms": "^1.0.18",
     "mocha": "^5.2.0",
     "proxyquire": "^1.7.10",
     "sinon": "^6.1.5",