Jest testing (#372)

* Updated webpack & bable to latest

* Added missing packages

* Setting up jest tests

Author: euvl

babel.config.js

@@ -1,11 +1,9 @@
-module.exports = function (babel) {
+module.exports = function(babel) {
   babel.cache(true);
-  
+
   return {
-    "presets": ["@babel/preset-env"],
-    "comments": false,
-    "plugins": [
-      "@babel/plugin-proposal-object-rest-spread"
-    ]
-  }
-}
+    presets: ["@babel/preset-env"],
+    comments: false,
+    plugins: ["@babel/plugin-proposal-object-rest-spread"]
+  };
+};

jest.config.js

@@ -0,0 +1,16 @@
+module.exports = {
+  "moduleFileExtensions": [
+    "js",
+    "vue"
+  ],
+  "moduleNameMapper": {
+    "^@/(.*)$": "<rootDir>/src/$1"
+  },
+  "transform": {
+    "^.+\\.js$": "<rootDir>/node_modules/babel-jest",
+    ".*\\.(vue)$": "<rootDir>/node_modules/vue-jest"
+  },
+  "snapshotSerializers": [
+    "<rootDir>/node_modules/jest-serializer-vue"
+  ]
+}