Bump revolt.js to fix objects not being properly updated.

Also don't re-fetch members on each message.
Add cursor: pointer to attachment images upon request.
Use client message cache for replies.

package.json

@@ -116,7 +116,7 @@
         "react-virtuoso": "^1.10.4",
         "redux": "^4.1.0",
         "revolt-api": "0.5.2-alpha.1",
-        "revolt.js": "5.0.1-alpha.3",
+        "revolt.js": "5.0.1-alpha.5",
         "rimraf": "^3.0.2",
         "sass": "^1.35.1",
         "shade-blend-color": "^1.0.0",