title: no version found com.google.firebase in react-native-fcm
body: <p>I'm using react native version 0.40, and followed the read me from this repo and i'm getting the following error when I try to run <code>react-native run-android</code>:</p>
  
  <blockquote>
    <p>could not find any matches for
    com.google.firebase:firebase-messaging:+ as no versions of
    com.google.firebase:firebase-messaging are available.</p>
  </blockquote>
  
  <p>I have no clue what is the source for this error. I searched everywhere and I couldn't debug this problem.</p>