Merge pull request phaserjs#2599 from monagames/typings-npm-entry

Typings entry in package.json

Author: photonstorm

package.json

@@ -46,6 +46,7 @@
     "typescript": "1.4.1",
     "yuidocjs": "^0.3.50"
   },
+  "typings": "./typescript/typings.json",
   "typescript": {
     "definitions": [
       "typescript/p2.d.ts",