Fix output filenames and exports

Author: romanlex

package.json

@@ -19,13 +19,13 @@
   "exports": {
     ".": {
       "types": "./index.d.ts",
-      "import": "./index-esm.js",
-      "require": "./index-cjs.js"
+      "import": "./index.js",
+      "require": "./index.cjs"
     },
     "./package.json": "./package.json"
   },
-  "main": "./index-cjs.js",
-  "module": "./index-esm.js",
+  "main": "./index.cjs",
+  "module": "./index.js",
   "types": "./index.d.ts",
   "scripts": {
     "postbuild": "node --no-warnings tools/postbuild.mjs",
@@ -75,4 +75,4 @@
   "engines": {
     "node": ">=18"
   }
-}
+}

rollup.config.mjs

@@ -10,13 +10,13 @@ export default {
     {
       format: 'esm',
       dir: 'dist',
-      entryFileNames: 'index-esm.js',
+      entryFileNames: 'index.js',
       plugins: [terser()],
     },
     {
       format: 'cjs',
       dir: 'dist',
-      entryFileNames: 'index-cjs.js',
+      entryFileNames: 'index.cjs',
       plugins: [terser()],
     },
   ],