chore: bump up all dependencies to v20 (#2120)

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

Author: renovate[bot]

package.json

@@ -34,8 +34,8 @@
   },
   "devDependencies": {
     "@changesets/cli": "^2.22.0",
-    "@commitlint/cli": "^19.0.0",
-    "@commitlint/config-conventional": "^19.0.0",
+    "@commitlint/cli": "^20.0.0",
+    "@commitlint/config-conventional": "^20.0.0",
     "@milkdown/dev": "workspace:*",
     "@rollup/plugin-commonjs": "^28.0.0",
     "@rollup/plugin-json": "^6.0.0",