Update dependency progress-bar-webpack-plugin to v1.12.1

Author: renovate-bot

package-lock.json

@@ -29,7 +29,7 @@
     "webworkify-webpack": "^2.1.3"
   },
   "devDependencies": {
-    "progress-bar-webpack-plugin": "1.11.0",
+    "progress-bar-webpack-plugin": "1.12.1",
     "webpack": "4.15.1",
     "webpack-cli": "3.0.8",
     "worker-loader": "2.0.0"