fix: introduced forwardRef (#185)

src/muiComponents/Dialog/Dialog.tsx

@@ -0,0 +1,10 @@
+import React, { forwardRef } from 'react';
+import { default as MaterialUIDialog, DialogProps } from '@material-ui/core/Dialog';
+
+type DialogRef = HTMLDivElement;
+
+const Dialog = forwardRef<DialogRef, DialogProps>(function Dialog(props, ref) {
+  return <MaterialUIDialog {...props} ref={ref} />;
+});
+
+export default Dialog;

src/muiComponents/Dialog/index.ts

@@ -0,0 +1 @@
+export { default } from './Dialog';