Do not bundle external 3rd party libraries

Author: petebacondarwin

package-lock.json

@@ -98,6 +98,7 @@
     "protractor-jasmine2-html-reporter": "0.0.7",
     "rimraf": "^2.5.1",
     "rollup": "^0.41.4",
+    "rollup-plugin-auto-external": "^2.0.0",
     "rollup-plugin-commonjs": "7.0.2",
     "rollup-plugin-node-resolve": "2.0.0",
     "rollup-plugin-uglify": "1.0.1",

package.json

@@ -1,5 +1,6 @@
 import nodeResolve from 'rollup-plugin-node-resolve';
 import commonjs from 'rollup-plugin-commonjs';
+import autoExternal from 'rollup-plugin-auto-external';
 import uglify from 'rollup-plugin-uglify';
 
 export default {
@@ -8,6 +9,7 @@ export default {
   plugins: [
     nodeResolve({ jsnext: true, main: true, module: true }),
     commonjs(),
+    autoExternal(),
     uglify()
   ],
   sourceMap: true,