npm: only package js and d.ts files (#1)

Author: zefir-git

package.json

@@ -5,6 +5,10 @@
     "module": "dist/index.js",
     "types": "dist/index.d.ts",
     "type": "module",
+    "files": [
+        "dist/**.js",
+        "dist/**.d.ts"
+    ],
     "scripts": {
         "build": "tsc",
         "prepare": "npm run build",