Resolve peer dependency support for React 16

Author: raymond-lam

example/package-lock.json

@@ -88,7 +88,7 @@
     "@fortawesome/fontawesome-svg-core": "^6.1.1",
     "@fortawesome/free-solid-svg-icons": "^5.15.3 || ^6.1.1",
     "@fortawesome/react-fontawesome": "^0.1.14 || ^0.2.0",
-    "@hello-pangea/dnd": "^18.0.1",
+    "@hello-pangea/dnd": "^16.0.0 || ^17.0.0 || ^18.0.1",
     "classnames": "^2.2.6",
     "react-jss": "^10.4.0",
     "react-select": "^5.0.0",