Update dependency acorn to v8.11.0

Author: renovate[bot]

package.json

@@ -34,7 +34,7 @@
     "@babel/plugin-transform-runtime": "7.11.0",
     "@babel/preset-env": "7.11.0",
     "@babel/runtime": "7.11.0",
-    "acorn": "8.0.1",
+    "acorn": "8.11.0",
     "autoprefixer": "9.8.2",
     "babel-loader": "8.1.0",
     "basiljs": "github:basiljs/basil.js#develop",