Move ui-identicon -> react-identicon (#165)

* Move ui-identicon -> react-identicon

* ui-identicon import fix

* Update README package links

* Update doc sidebar links

* Adjust react-qr signatures, CHANGELOG

packages/react-identicon/src/beachball/shape/circle.spec.ts

@@ -0,0 +1,18 @@
+// Copyright 2017-2019 @polkadot/react-identicon authors & contributors
+// This software may be modified and distributed under the terms
+// of the Apache-2.0 license. See the LICENSE file for details.
+
+import xmlserializer from 'xmlserializer';
+
+import seeder from '../seeder';
+import circle from './circle';
+
+describe('circle', (): void => {
+  it('creates a circle shape', (): void => {
+    expect(
+      xmlserializer.serializeToString(
+        circle(seeder(), 'blue', 50, 2)
+      )
+    ).toEqual('<circle xmlns="http://www.w3.org/2000/svg" cx="25" cy="32.5" r="15" fill="blue"/>');
+  });
+});