Remove fbjs dependency (#13069)

* Inline fbjs/lib/invariant

* Inline fbjs/lib/warning

* Remove remaining usage of fbjs in packages/*.js

* Fix lint

* Remove fbjs from dependencies

* Protect against accidental fbjs imports

* Fix broken test mocks

* Allow transitive deps on fbjs/ for UMD bundles

* Remove fbjs from release script

package.json

@@ -15,7 +15,6 @@
   },
   "homepage": "https://reactjs.org/",
   "dependencies": {
-    "fbjs": "^0.8.16",
     "object-assign": "^4.1.1",
     "prop-types": "^15.6.0",
     "react-is": "^16.4.1"

src/ReactShallowRenderer.js

@@ -11,7 +11,7 @@ import {isForwardRef} from 'react-is';
 import describeComponentFrame from 'shared/describeComponentFrame';
 import getComponentName from 'shared/getComponentName';
 import shallowEqual from 'shared/shallowEqual';
-import invariant from 'fbjs/lib/invariant';
+import invariant from 'shared/invariant';
 import checkPropTypes from 'prop-types/checkPropTypes';
 
 const emptyObject = {};

src/ReactTestRenderer.js

@@ -28,7 +28,7 @@ import {
   ForwardRef,
   Profiler,
 } from 'shared/ReactTypeOfWork';
-import invariant from 'fbjs/lib/invariant';
+import invariant from 'shared/invariant';
 
 import * as ReactTestHostConfig from './ReactTestHostConfig';
 import * as TestRendererScheduling from './ReactTestRendererScheduling';