feat: Add react package (#4)

* chore: Organise

* feat: Add `react` package

* refactor: Remove unneeded char

packages/js/src/__tests__/index.test.js

@@ -0,0 +1,8 @@
+/* eslint-env jest */
+import feather from '../index';
+
+test('has correct properties', () => {
+  expect(feather).toHaveProperty('icons');
+  expect(feather).toHaveProperty('toSvg');
+  expect(feather).toHaveProperty('replace');
+});