add customized yas-snippets

snippets/js-mode/rtc

@@ -0,0 +1,20 @@
+# -*- mode: snippet -*-
+# name: react class component template
+# key: rtc
+# --
+import { Component } from 'react';
+
+class $1 extends Component {
+  constructor(props) {
+    super(props);
+    $2
+  }
+
+  render() {
+    return (
+      $0
+    );
+  }
+}
+
+export default $1;