Update dependency @riotjs/compiler to v9.4.9 (#2523)

Co-authored-by: renovate[bot] <29139614+renovate[bot]@users.noreply.github.com>

Author: renovate[bot]

libraries/riot/package.json

@@ -5,7 +5,7 @@
   },
   "library_repo": "riot/riot",
   "devDependencies": {
-    "@riotjs/compiler": "9.0.7",
+    "@riotjs/compiler": "9.4.9",
     "@riotjs/webpack-loader": "9.0.1",
     "babel-core": "6.26.3",
     "babel-loader": "9.1.3",