fix(package): update react to version 16.3.2

Closes #11

Author: greenkeeper[bot]

package.json

@@ -9,7 +9,7 @@
   "author": "",
   "license": "ISC",
   "dependencies": {
-    "react": "^15.4.1",
+    "react": "^16.3.2",
     "react-dom": "^15.4.1",
     "steal": "^1.0.10",
     "steal-jsx": "^0.0.2"