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

test/build-artifacts/.eslintrc

@@ -0,0 +1,14 @@
+{
+  "rules": {
+    "import/no-unresolved": 0,
+    "import/extensions": 0,
+    "quotes": [
+      "error",
+      "single"
+    ],
+    "semi": [
+      "error",
+      "always"
+    ]
+  }
+}

test/build-artifacts/es-bundle-core.js

@@ -0,0 +1,8 @@
+import { describe, expect, test } from '@jest/globals';
+import SwaggerUI from '../../dist/swagger-ui-es-bundle-core';
+
+describe('webpack browser es-bundle-core build', () => {
+  test('should export a function for es-bundle-core', () => {
+    expect(SwaggerUI).toBeInstanceOf(Function);
+  });
+});

test/build-artifacts/es-bundle.js

@@ -0,0 +1,8 @@
+import { describe, expect, test } from '@jest/globals';
+import SwaggerUI from '../../dist/swagger-ui-es-bundle';
+
+describe('webpack browser es-bundle build', () => {
+  test('should export a function for es-bundle', () => {
+    expect(SwaggerUI).toBeInstanceOf(Function);
+  });
+});

test/build-artifacts/umd.js

@@ -0,0 +1,8 @@
+import { describe, expect, test } from '@jest/globals';
+import SwaggerUI from '../../dist/swagger-ui-bundle';
+
+describe('webpack browser umd build', () => {
+  test('should export a function for (umd) bundle', () => {
+    expect(SwaggerUI).toBeInstanceOf(Function);
+  });
+});