fix typings filename ref

Author: mohsinulhaq

package.json

@@ -13,7 +13,7 @@
   "files": [
     "lib",
     "dist",
-    "typings/react-popper.d.ts"
+    "typings/react-popper-tooltip.d.ts"
   ],
   "scripts": {
     "build": "npm run build:cjs && npm run build:esm && cp src/styles.css dist",