feat(reorganize): websocket subject creator now exported from rxjs/websocket

BREAKING CHANGE: `webSocket` creator function now exported from `rxjs/websocket` as `websocket`.

Author: benlesh

spec/websocket/index-spec.ts

@@ -0,0 +1,8 @@
+import * as index from '../../src/websocket/index';
+import { expect } from 'chai';
+
+describe('index', () => {
+  it('should export static websocket subject creator functions', () => {
+    expect(index.websocket).to.exist;
+  });
+});

src/websocket/index.ts

@@ -0,0 +1 @@
+export { webSocket as websocket } from '../internal/observable/dom/webSocket';