fix: remove necessary dts file, close #141

Author: antfu

helpers.d.ts

@@ -15,8 +15,7 @@
   "module": "./dist/index.js",
   "types": "./dist/index.d.ts",
   "files": [
-    "dist",
-    "*.d.ts"
+    "dist"
   ],
   "scripts": {
     "build": "tsdown",