Merge pull request #240 from streamich/dependabot/npm_and_yarn/yarn-1.19.1

chore(deps-dev): bump yarn from 1.7.0 to 1.19.1

Author: streamich

package.json

@@ -80,7 +80,7 @@
     "webpack": "3.12.0",
     "webpack-bundle-analyzer": "3.6.0",
     "webpack-dev-server": "3.1.11",
-    "yarn": "1.7.0"
+    "yarn": "1.19.1"
   },
   "config": {
     "commitizen": {