[3.0-preview] Update webcomponentsjs to v2.0.0-0 . (#1103)

* Update `package.json` and `package-lock.json`.

* `webcomponents-lite.js` -> `webcomponents-bundle.js`

* Use @webcomponents/webcomponentjs `^1.2.0 || ^2.0.0-0` to allow it to be deduped with Polymer v3.0.0-pre.12 .

* Revert "Use @webcomponents/webcomponentjs `^1.2.0 || ^2.0.0-0` to allow it to be deduped with Polymer v3.0.0-pre.12 ."

This reverts commit 820da72.

* Update Polymer to ^3.0.0-pre.13 which depends on webcomponentsjs ^2.0.0-0.

* Update elements to ^3.0.0-pre.13, which now depend on @polymer/polymer ^3.0.0-pre.13.

* Update webcomponentsjs to ^2.0.0-beta.2 .

* Update element dependencies to ^3.0.0-pre.14 .

* Update elements to ^3.0.0-pre.15 ; rebuild package-lock.json.

Author: bicknellr

package-lock.json

@@ -13,16 +13,16 @@
     "test:integration": "polymer build # test that psk builds without error with the CLI"
   },
   "dependencies": {
-    "@polymer/app-layout": "^3.0.0-pre.12",
-    "@polymer/app-route": "^3.0.0-pre.12",
-    "@polymer/iron-flex-layout": "^3.0.0-pre.12",
-    "@polymer/iron-iconset-svg": "^3.0.0-pre.12",
-    "@polymer/iron-media-query": "^3.0.0-pre.12",
-    "@polymer/iron-pages": "^3.0.0-pre.12",
-    "@polymer/iron-selector": "^3.0.0-pre.12",
-    "@polymer/paper-icon-button": "^3.0.0-pre.12",
-    "@polymer/polymer": "^3.0.0-pre.12",
-    "@webcomponents/webcomponentsjs": "^1.2.0"
+    "@polymer/app-layout": "^3.0.0-pre.15",
+    "@polymer/app-route": "^3.0.0-pre.15",
+    "@polymer/iron-flex-layout": "^3.0.0-pre.15",
+    "@polymer/iron-iconset-svg": "^3.0.0-pre.15",
+    "@polymer/iron-media-query": "^3.0.0-pre.15",
+    "@polymer/iron-pages": "^3.0.0-pre.15",
+    "@polymer/iron-selector": "^3.0.0-pre.15",
+    "@polymer/paper-icon-button": "^3.0.0-pre.15",
+    "@polymer/polymer": "^3.0.0-pre.13",
+    "@webcomponents/webcomponentsjs": "^2.0.0-beta.2"
   },
   "devDependencies": {
     "polymer-cli": "^1.7.0-pre.17",

package.json

@@ -16,7 +16,7 @@
 
     <title>my-view1</title>
 
-    <script src="../node_modules/@webcomponents/webcomponentsjs/webcomponents-lite.js"></script>
+    <script src="../node_modules/@webcomponents/webcomponentsjs/webcomponents-bundle.js"></script>
     <script src="../node_modules/wct-browser-legacy/browser.js"></script>
 
     <!-- Import the element to test -->