Update dependency @ampproject/rollup-plugin-closure-compiler to v0.22.1 (#31)

Author: renovate-bot

package.json

@@ -32,7 +32,7 @@
     "mri": "1.1.4"
   },
   "devDependencies": {
-    "@ampproject/rollup-plugin-closure-compiler": "0.21.0",
+    "@ampproject/rollup-plugin-closure-compiler": "0.22.1",
     "@rollup/plugin-commonjs": "11.0.2",
     "@rollup/plugin-node-resolve": "7.1.1",
     "@rollup/plugin-typescript": "3.0.0",