feat(build): es2015 bundle artifact (#6291)

* es2015 bundle with dependencies via npm script build:es:bundle
* es2015 bundle without dependencies via npm script build:es:bundle
* jest dependency for test:artifact
* migrate babel.config.json to babel.config.js and maintain env support for commonjs and es2015
* remove polyfill
* fix es syntax: replace module.exports with export
* fix es syntax: remove .jsx extension inside import

config/.eslintrc

@@ -0,0 +1,8 @@
+{
+  "rules": {
+    "import/no-unresolved": 0,
+    "import/extensions": 0,
+    "quotes": ["error", "single"],
+    "semi": ["error", "always"]
+  }
+}

config/jest/jest.artifact-es-bundle-core.config.js

@@ -0,0 +1,7 @@
+const path = require('path');
+
+module.exports = {
+  rootDir: path.join(__dirname, '..', '..'),
+  testEnvironment: 'jsdom',
+  testMatch: ['**/test/build-artifacts/es-bundle-core.js'],
+};

config/jest/jest.artifact-es-bundle.config.js

@@ -0,0 +1,7 @@
+const path = require('path');
+
+module.exports = {
+  rootDir: path.join(__dirname, '..', '..'),
+  testEnvironment: 'jsdom',
+  testMatch: ['**/test/build-artifacts/es-bundle.js'],
+};

config/jest/jest.artifact-umd-bundle.config.js

@@ -0,0 +1,7 @@
+const path = require('path');
+
+module.exports = {
+  rootDir: path.join(__dirname, '..', '..'),
+  testEnvironment: 'jsdom',
+  testMatch: ['**/test/build-artifacts/umd.js'],
+};