update dependencies

docs/package.json

@@ -32,7 +32,7 @@
     "y-prosemirror": "^1.0.5",
     "y-webrtc": "^10.1.7",
     "y-websocket": "^1.3.8",
-    "yjs": "^13.4.7"
+    "yjs": "^13.4.12"
   },
   "devDependencies": {
     "@babel/plugin-proposal-optional-chaining": "^7.12.7",
@@ -40,7 +40,7 @@
     "@babel/preset-react": "^7.12.10",
     "html-loader": "^1.3.2",
     "node-sass": "^5.0.0",
-    "sass-loader": "^10.0.3",
+    "sass-loader": "^10.1.1",
     "style-resources-loader": "^1.4.1",
     "ts-loader": "^8.0.14"
   }