peer dependency problem

Hello.
I'm a big fan of ur package and I really have used it well.

but, recently I tried to upgrade package version.
then I met peer dependency problem with react 15.3.1.

below is the error message.

```
└── UNMET PEER DEPENDENCY react@15.1.0 invalid
```

and it installed 3.2.1 version. (what I tried was 3.4.0)

and I use npm@3.10.3 at node v6.5.0