fix typings path

package.json

@@ -1,10 +1,10 @@
 {
   "name": "wastedrendersdetector",
-  "version": "1.1.0",
+  "version": "1.2.1",
   "author": "Microsoft Corp.",
   "description": "Tool to debug wasted renders",
   "main": "lib/index.js",
-  "types": "./lib/main.d.ts",
+  "types": "./lib/index.d.ts",
   "scripts": {
     "test": "echo \"Error: no test specified\" && exit 1",
     "build": "tsc",