add umd runtime build for CDN (close #3948)

Author: yyx990803

build/config.js

@@ -22,10 +22,17 @@ const builds = {
     format: 'cjs',
     banner
   },
-  // Minified runtime, only for filze size monitoring
-  'web-runtime-prod': {
+  // runtime-only build for CDN
+  'web-runtime-cdn-dev': {
     entry: path.resolve(__dirname, '../src/entries/web-runtime.js'),
-    dest: path.resolve(__dirname, '../dist/vue.common.min.js'),
+    dest: path.resolve(__dirname, '../dist/vue.runtime.js'),
+    format: 'umd',
+    banner
+  },
+  // runtime-only production build for CDN
+  'web-runtime-cdn-prod': {
+    entry: path.resolve(__dirname, '../src/entries/web-runtime.js'),
+    dest: path.resolve(__dirname, '../dist/vue.runtime.min.js'),
     format: 'umd',
     env: 'production',
     banner

package.json

@@ -6,6 +6,8 @@
   "typings": "types/index.d.ts",
   "files": [
     "dist/vue.common.js",
+    "dist/vue.runtime.js",
+    "dist/vue.runtime.min.js",
     "dist/vue.js",
     "dist/vue.min.js",
     "src",