Update to React 15.2.0 final

Summary: This should have literally no changes from the RC that affect RN -- just a version bump.

Reviewed By: vjeux

Differential Revision: D3511116

fbshipit-source-id: 5bb3a330c0d2e78a2f3dfbb0e948c99607d2e66e

package.json

@@ -125,7 +125,7 @@
     "react-native": "local-cli/wrong-react-native.js"
   },
   "peerDependencies": {
-    "react": "~15.2.0-rc.1"
+    "react": "~15.2.0"
   },
   "dependencies": {
     "absolute-path": "^0.0.0",
@@ -204,7 +204,7 @@
     "jest-repl": "^13.0.0",
     "jest-runtime": "^13.0.0",
     "portfinder": "0.4.0",
-    "react": "~15.2.0-rc.1",
+    "react": "~15.2.0",
     "shelljs": "0.6.0"
   }
 }