Return material-ui/lab

plugins/scaffolder/package.json

@@ -38,6 +38,7 @@
     "@backstage/theme": "^0.2.3",
     "@material-ui/core": "^4.11.0",
     "@material-ui/icons": "^4.9.1",
+    "@material-ui/lab": "4.0.0-alpha.45",
     "@rjsf/core": "^2.4.0",
     "@rjsf/material-ui": "^2.4.0",
     "classnames": "^2.2.6",