Point to develop dependencies and fixed react-gemini-scrollbar

Fixes https://github.com/vector-im/riot-web/issues/10894

See https://github.com/matrix-org/react-gemini-scrollbar/pull/3

package.json

@@ -85,7 +85,7 @@
     "linkifyjs": "^2.1.6",
     "lodash": "^4.17.14",
     "lolex": "2.3.2",
-    "matrix-js-sdk": "2.3.2",
+    "matrix-js-sdk": "github:matrix-org/matrix-js-sdk#develop",
     "optimist": "^0.6.1",
     "pako": "^1.0.5",
     "png-chunks-extract": "^1.0.0",
@@ -97,7 +97,7 @@
     "react-addons-css-transition-group": "15.6.2",
     "react-beautiful-dnd": "^4.0.1",
     "react-dom": "^16.9.0",
-    "react-gemini-scrollbar": "github:matrix-org/react-gemini-scrollbar#f644523",
+    "react-gemini-scrollbar": "github:matrix-org/react-gemini-scrollbar#d3a2b21",
     "resize-observer-polyfill": "^1.5.0",
     "sanitize-html": "^1.18.4",
     "slate": "^0.41.2",