Update dependencies & change to React-router v5

.babelrc

@@ -7,7 +7,7 @@
     "test": {
       "presets": ["env" ,"react", "es2015"],
       "plugins": [
-        [ "babel-plugin-webpack-alias", { "config": "${PWD}/webpack.config.js" } ]
+        [ "babel-plugin-webpack-alias", { "config": "<rootDir>/webpack.config.js" } ]
       ]
     }
   }