chore(package): update react to version 15.6.1

Closes #22

Author: greenkeeper[bot]

package.json

@@ -17,7 +17,7 @@
     "blue-tape": "^1.0.0",
     "jspm": "^0.16.42",
     "onchange": "^3.2.1",
-    "react": "15.5.4",
+    "react": "15.6.1",
     "react-router": "4.1.1",
     "stream": "0.0.2",
     "tap-spec": "^4.1.1",