Bump jsdom to 16 (#2324)

* bumped to jsdom 10.1.0

* bumped to jsdom 12.2.0

* bumped to jsdom 16.5.2

* fix test with custom submit buttons

* reverting to jsdom 15.1.1 due to regression in test

* remove jsdom from packages using jest since jsdom comes bundled with jest

* hard locking jsdom to 15.1.1

* fix issue related to jsdom 15.2 and bump to 16

* add comment about why getAttribute(value) is necessary in some tests

Author: Jimmy Callin

packages/antd/package-lock.json

@@ -95,5 +95,6 @@
   "homepage": "https://github.com/rjsf-team/react-jsonschema-form",
   "publishConfig": {
     "access": "public"
-  }
+  },
+  "dependencies": {}
 }