better export

package.json

@@ -5,10 +5,17 @@
   "main": "dist/index.cjs",
   "module": "dist/index.mjs",
   "types": "dist/index.d.ts",
+  "exports": {
+    ".": {
+      "import": "./dist/index.mjs",
+      "require": "./dist/index.cjs",
+      "types": "./dist/index.d.ts"
+    }
+  },
   "scripts": {
     "lint": "eslint --fix .",
-    "compile:cjs": "esbuild index.ts --outfile=dist/index.cjs --bundle --sourcemap --platform=node --target=es2019 --external:js-base64",
-    "compile:esm": "esbuild index.ts --outfile=dist/index.mjs --bundle --sourcemap --platform=neutral --target=esnext --external:js-base64",
+    "compile:cjs": "esbuild index.ts --outfile=dist/index.cjs --bundle --sourcemap --platform=node --target=es2019 --external:*",
+    "compile:esm": "esbuild index.ts --outfile=dist/index.mjs --bundle --sourcemap --platform=neutral --target=esnext --external:*",
     "compile:types": "tsc --emitDeclarationOnly --declaration",
     "build": "rimraf dist && npm run compile:cjs && npm run compile:esm && npm run compile:types",
     "test": "jest --passWithNoTests",