feat: add esm bundling

package.json

@@ -25,6 +25,7 @@
     "prepare": "husky install",
     "build": "rimraf ./dist; run-s build:**",
     "build:esm": "tsc && node build-scripts/fix-imports.js",
+    "build:bundle": "rollup --config rollup.config.js -- dist/esm/index.js",
     "build:umd": "webpack --config webpack.umd.config.cjs",
     "build:umd:min": "terser --ecma 6 --compress --mangle -o dist/umd/index.min.js -- dist/umd/index.js && gzip -9 -c dist/umd/index.min.js > dist/umd/index.min.js.gz",
     "size": "npm run build && size-limit",

rollup.config.js

@@ -5,8 +5,8 @@ import nodePolyfills from "rollup-plugin-polyfill-node";
 
 export default {
   output: {
-    file: "dist/umd/index.js",
-    format: "umd",
+    file: "dist/bundle.js",
+    format: "esm",
     name: "waku",
   },
   plugins: [