feat: added cjs entry

index.cjs

@@ -0,0 +1,8 @@
+const fs = require('fs');
+
+const fsExists = async filePath => fs.promises.access(
+	filePath,
+	fs.constants.F_OK,
+).then(() => true, () => false);
+
+module.exports = fsExists;

package.json

@@ -17,10 +17,14 @@
 	},
 	"type": "module",
 	"files": [
+		"index.cjs",
 		"index.js",
 		"index.d.ts"
 	],
-	"exports": "./index.js",
+	"exports": {
+	  "import": "./index.js",
+	  "require": "./index.cjs"
+	},
 	"scripts": {
 		"build": "tsc",
 		"lint": "eslint .",