Migrate to ESM-only

Author: wojtekmaj

package.json

@@ -4,22 +4,15 @@
   "description": "A collection of array-related async utilities.",
   "type": "module",
   "sideEffects": false,
-  "main": "./dist/cjs/index.js",
-  "module": "./dist/esm/index.js",
+  "main": "./dist/index.js",
   "source": "./src/index.ts",
-  "types": "./dist/cjs/index.d.ts",
+  "types": "./dist/index.d.ts",
   "exports": {
-    ".": {
-      "import": "./dist/esm/index.js",
-      "require": "./dist/cjs/index.js"
-    },
+    ".": "./dist/index.js",
     "./*": "./*"
   },
   "scripts": {
-    "build": "yarn build-esm && yarn build-cjs && yarn build-cjs-package",
-    "build-esm": "tsc --project tsconfig.build.json --outDir dist/esm",
-    "build-cjs": "tsc --project tsconfig.build.json --outDir dist/cjs --module commonjs --moduleResolution node --verbatimModuleSyntax false",
-    "build-cjs-package": "echo '{\n  \"type\": \"commonjs\"\n}' > dist/cjs/package.json",
+    "build": "tsc --project tsconfig.build.json",
     "clean": "rimraf dist",
     "format": "biome format",
     "lint": "biome lint",