Don't publish .ts files to npm

Fixes #93

Author: chancancode

package.json

@@ -5,7 +5,8 @@
   "main": "lib/index.js",
   "types": "lib/index.d.ts",
   "files": [
-    "lib"
+    "lib/**/*.js",
+    "lib/**/*.d.ts"
   ],
   "scripts": {
     "test": "npm run test:js",