Make sure Vue tests work

Author: w3bdesign

jest.config.js

@@ -4,6 +4,7 @@ module.exports = {
     '^~/(.*)$': '<rootDir>/$1',
     '^vue$': 'vue/dist/vue.common.js',
   },
+  testEnvironment: 'jsdom',
   moduleFileExtensions: ['js', 'vue', 'json'],
   transform: {
     '^.+\\.js$': 'babel-jest',