message: Add css files as sideEffects
  According to about tree shaking, css files should be considered as side effects: https://webpack.js.org/guides/tree-shaking/#:~:text=**/*.css.-,Tip,-Note%20that%20any
diff: "main": "dist/umd/index.js",
  "module": "dist/esm/index.js",
  "types": "dist/esm/index.d.ts",
  - "sideEffects": false,
  + "sideEffects": ["*.css"],
  "license": "MIT",
  "repository": {
  "type": "git",
  