chore: use servor dependency instead of serve (#891)

- [servor`](https://www.npmjs.com/package/servor) seems to be much smaller than `serve` and has 0 deps which is far from being the case with `serve`

package.json

@@ -37,7 +37,7 @@
     "new-version": "lerna version",
     "new-publish": "lerna publish from-package",
     "roll-new-release": "pnpm bundle && pnpm new-version && pnpm new-publish",
-    "serve:demo": "serve ./docs -l 8888",
+    "serve:demo": "servor ./docs index.html 8888",
     "lint": "eslint packages --ext .ts",
     "test": "jest --runInBand --coverage=true --config ./test/jest.config.ts",
     "test:ci": "jest --runInBand --coverage=true --ci --config ./test/jest.config.ts",
@@ -74,7 +74,7 @@
     "pnpm": "^7.26.3",
     "rimraf": "^3.0.2",
     "rxjs": "^7.5.7",
-    "serve": "^14.2.0",
+    "servor": "^4.0.2",
     "slickgrid": "^3.0.3",
     "sortablejs": "^1.15.0",
     "ts-jest": "^29.0.5",