revert dep update since it broke auth (#2734)

Author: Feiyang1

packages/auth/package.json

@@ -23,7 +23,7 @@
   },
   "devDependencies": {
     "google-closure-compiler": "20200112.0.0",
-    "google-closure-library": "20200224.0.0",
+    "google-closure-library": "20190709.0.0",
     "gulp": "4.0.2",
     "gulp-sourcemaps": "2.6.5"
   },

packages/webchannel-wrapper/package.json

@@ -16,7 +16,7 @@
   "license": "Apache-2.0",
   "devDependencies": {
     "closure-builder": "2.3.8",
-    "google-closure-library": "20200224.0.0",
+    "google-closure-library": "20200101.0.0",
     "rollup": "1.32.1",
     "rollup-plugin-commonjs": "10.1.0",
     "rollup-plugin-sourcemaps": "0.5.0"