Fix rollup complaining about missing export

Author: jstcki

package.json

@@ -66,6 +66,7 @@
     "docs"
   ],
   "resolutions": {
-    "@types/webpack": "^4.4.24"
+    "@types/webpack": "^4.4.24",
+    "prop-types": "^15.7.2"
   }
 }

yarn.lock

@@ -9728,15 +9728,7 @@ promzard@^0.3.0:
   dependencies:
     read "1"
 
-prop-types@^15.5.6:
-  version "15.6.2"
-  resolved "https://registry.yarnpkg.com/prop-types/-/prop-types-15.6.2.tgz#05d5ca77b4453e985d60fc7ff8c859094a497102"
-  integrity sha512-3pboPvLiWD7dkI3qf3KbUe6hKFKa52w+AE0VCqECtf+QHAKgOL37tTaNCnuX1nAAQ4ZhyP+kYVKf8rLmJ/feDQ==
-  dependencies:
-    loose-envify "^1.3.1"
-    object-assign "^4.1.1"
-
-prop-types@^15.6.0, prop-types@^15.6.2, prop-types@^15.7.2:
+prop-types@^15.5.6, prop-types@^15.6.0, prop-types@^15.6.2, prop-types@^15.7.2:
   version "15.7.2"
   resolved "https://registry.yarnpkg.com/prop-types/-/prop-types-15.7.2.tgz#52c41e75b8c87e72b9d9360e0206b99dcbffa6c5"
   integrity sha512-8QQikdH7//R2vurIJSutZ1smHYTcLpRWEOlHnzcWHmBYrOGUysKwSsrC89BCiFj3CbrfJ/nXFdJepOVrY1GCHQ==