fix(dist): some minor review and cleanup of typings

Author: KaiSchwarz-cnic

package.json

@@ -3,9 +3,8 @@
   "description": "A UTS #46 processing algorithm for IDNA2008 strings",
   "version": "4.0.0",
   "private": false,
-  "module": "dist/index.esm.js",
-  "main": "dist/index.cjs.js",
-  "typings": "dist/index.d.ts",
+  "module": "dist/index.mjs",
+  "main": "dist/index.cjs",
   "license": "MIT",
   "sideEffects": false,
   "engines": {

rollup-esm.config.mjs

@@ -2,7 +2,7 @@ export default {
   input: 'src/index.js',
   output: [
     {
-      file: 'dist/index.esm.js',
+      file: 'dist/index.mjs',
       format: 'es',
     },
   ],

rollup.config.mjs

@@ -6,7 +6,7 @@ export default {
   input: 'src/index.js',
   output: [
     {
-      file: 'dist/index.cjs.js',
+      file: 'dist/index.cjs',
       format: 'cjs',
     },
     {