Add tests for preact

Author: inokawa

fixtures/Component-preact.jsx

@@ -0,0 +1,7 @@
+import React from 'preact';
+
+export default () => {
+  return (
+    <div style={{background: 'red', width: '100vw', height: '100vh'}}>hoge</div>
+  );
+};

fixtures/app-export-default-preact.jsx

@@ -0,0 +1,10 @@
+import React from "preact";
+import { webViewRender } from "react-native-react-bridge/lib/web/preact";
+import Comp from "./Component-preact";
+import './example.css'
+
+const App = () => {
+  return <Comp />;
+};
+
+export default webViewRender(App);