Upgrade matter-js to version 0.20.0

This version uses fixed rates across platforms in Matter.Runner. This fixes inconsistent rates in `physics.ts`.

Author: CenTdemeern1

packages/frontend/package.json

@@ -50,7 +50,7 @@
 		"insert-text-at-cursor": "0.3.0",
 		"is-file-animated": "1.0.2",
 		"json5": "2.2.3",
-		"matter-js": "0.19.0",
+		"matter-js": "0.20.0",
 		"mfm-js": "0.24.0",
 		"misskey-bubble-game": "workspace:*",
 		"misskey-js": "workspace:*",