fix(bundle): Only bundle ui-router-ng2 code (do not bundle ui-router-core)

BREAKING CHANGE: We no longer bundle ui-router-core nor ui-router-rx into the UMD bundle.
This change is most likely to affect:

- SystemJS projects
- projects that do not bundle (but ship pre-built UMD bundles)
- Users of ui-router plugins that import ui-router-core, such as sticky-states.

Author: christopherthielen

package.json

@@ -1,7 +1,7 @@
 {
   "name": "ui-router-ng2",
   "description": "State-based routing for Angular 2",
-  "version": "1.0.0-beta.4",
+  "version": "1.0.0-beta.5",
   "scripts": {
     "clean": "shx rm -rf lib lib-esm _bundles _dec",
     "compile": "npm run clean && ngc",
@@ -39,7 +39,7 @@
   "module": "lib/index.js",
   "typings": "lib/index.d.ts",
   "dependencies": {
-    "ui-router-core": "=4.0.0",
+    "ui-router-core": "=5.0.0",
     "ui-router-rx": "=0.2.1"
   },
   "peerDependencies": {

rollup.config.js

@@ -22,7 +22,7 @@ uglifyOpts.output.comments = (node, comment) =>
 comment.type === 'comment2' && /@license/i.test(comment.value);
 
 let plugins = [
-  nodeResolve({jsnext: true}),
+  nodeResolve({ jsnext: true }),
   progress(),
   sourcemaps(),
   commonjs(),
@@ -41,9 +41,14 @@ function onwarn(warning) {
 }
 
 function isExternal(id) {
+  // ui-router-core and ui-router-rx should be external
   // All rxjs and @angular/* should be external
   // except for @angular/router/src/router_config_loader
-  let externals = [ /^rxjs/, /^@angular\/(?!router\/src\/router_config_loader)/, ];
+  let externals = [
+    /^ui-router-(core|rx)/,
+    /^rxjs/,
+    /^@angular\/(?!router\/src\/router_config_loader)/,
+  ];
   return externals.map(regex => regex.exec(id)).reduce((acc, val) => acc || !!val, false);
 }
 
@@ -89,6 +94,8 @@ const CONFIG = {
     'rxjs/operator/filter': 'Rx.Observable.prototype',
     'rxjs/operator/concatMap': 'Rx.Observable.prototype',
 
+    'ui-router-core': 'ui-router-core',
+    'ui-router-rx': 'ui-router-rx',
     '@angular/core': 'ng.core',
     '@angular/common': 'ng.common',
   }