* updated babel-core

* installed @babel/runtime for regenerator-runtime
* added dummy test
* configured jest (transforms, ignore patterns, module mapper @/, jest-transform-stub)

babel.config.js

@@ -1,5 +1,15 @@
 module.exports = {
-  presets: [
-    '@vue/cli-plugin-babel/preset'
+
+  presets: ["@babel/preset-env"],
+
+  env: {
+    test: {
+      plugins: ["@babel/plugin-transform-runtime"]
+    }
+  },
+
+  plugins: [
+    ["@babel/transform-runtime"]
   ]
+
 }

jest.config.js

@@ -0,0 +1,42 @@
+module.exports = {
+
+  verbose: true,
+
+  testEnvironment: 'jsdom',
+
+  moduleFileExtensions: [
+    'js',
+    'json',
+    'vue'
+  ],
+
+  moduleNameMapper: {
+    "^.+\\.(css|styl|less|sass|scss|png|jpg|ttf|woff|woff2)$": "jest-transform-stub",
+    // enable import beginning with @/ - as reference to <root>/src/ folder
+    "^@/(.*)$": "<rootDir>/src/$1"
+  },
+
+  modulePathIgnorePatterns: [
+    '<rootDir>/build/',
+    '<rootDir>/dist/',
+    '<rootDir>/coverage/'
+  ],
+
+  transform: {
+    '.*\\.(vue)$': 'vue-jest',
+    '.*\\.(js)$': 'babel-jest'
+  },
+
+  collectCoverage: true,
+  collectCoverageFrom: ['src/**/*.{js,vue}', '!**/node_modules/**'],
+  coveragePathIgnorePatterns: [],
+  coverageThreshold: {
+    global: {
+      branches: 100,
+      functions: 100,
+      lines: 100,
+      statements: 100
+    }
+  },
+
+}