fix: introduced forwardRef (#163)

src/muiComponents/Avatar/Avatar.tsx

@@ -0,0 +1,13 @@
+import React, { forwardRef } from 'react';
+import { default as MaterialUIAvatar, AvatarProps } from '@material-ui/core/Avatar';
+
+// The default element type of MUI's Avatar is 'div' and we don't allow the change of this prop
+type AvatarRef = HTMLElementTagNameMap['div'];
+
+/* eslint-disable verdaccio/jsx-spread */
+// eslint-disable-next-line react/display-name
+const Avatar = forwardRef<AvatarRef, AvatarProps>(function Avatar(props, ref) {
+  return <MaterialUIAvatar {...props} ref={ref} />;
+});
+
+export default Avatar;

src/muiComponents/Avatar/index.ts

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