Swap out the resizer lib for something more stable

react-resizer appears to be okay at tracking state, but it often desyncs from reality. re-resizer is more maintained and more broadly used (160k downloads vs 110k), and appears to generally do a better job of tracking the cursor.

The new library has some oddities though, such as deltas, touch support (hence the polyfill), and calling handles "Enable".

For https://github.com/vector-im/riot-web/issues/14022

package.json

@@ -89,11 +89,11 @@
     "prop-types": "^15.5.8",
     "qrcode": "^1.4.4",
     "qs": "^6.6.0",
+    "re-resizable": "^6.5.2",
     "react": "^16.9.0",
     "react-beautiful-dnd": "^4.0.1",
     "react-dom": "^16.9.0",
     "react-focus-lock": "^2.2.1",
-    "react-resizable": "^1.10.1",
     "react-transition-group": "^4.4.1",
     "resize-observer-polyfill": "^1.5.0",
     "sanitize-html": "^1.18.4",