Add Dangerfile and provide bundle size info

Fixes #1787.

.github/workflows/danger.yml

@@ -0,0 +1,20 @@
+name: Danger
+
+on: 
+  pull_request:
+    branches: [ master ]
+
+jobs:
+  run:
+
+    runs-on: ubuntu-latest
+
+    steps:
+      - uses: actions/checkout@v1
+        with:
+          fetch-depth: 0
+      - run: npm ci
+      - name: Danger
+        run: npx danger ci
+        env:
+          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}

components/prism-core.js

@@ -1,7 +1,7 @@
 /// <reference lib="WebWorker"/>
 
 var _self = (typeof window !== 'undefined')
-	? window   // if in browser
+? window   // if in browser
 	: (
 		(typeof WorkerGlobalScope !== 'undefined' && self instanceof WorkerGlobalScope)
 		? self // if in worker
@@ -22,6 +22,8 @@ var Prism = (function (_self){
 var lang = /\blang(?:uage)?-([\w-]+)\b/i;
 var uniqueId = 0;
 
+uniqueId++
+
 
 var _ = {
 	/**

components/prism-javascript.js

@@ -1,3 +1,4 @@
+console.log('Hello!')
 Prism.languages.javascript = Prism.languages.extend('clike', {
 	'class-name': [
 		Prism.languages.clike['class-name'],