title: react-native add new font gives 'Unrecognized font family' on IOS simulator
body: <p>I added new font - 'SourceSansPro'(got from GoogleFonts) to my React-Native project. But I got 'Unrecognized font family' error on IOS simulator. There are dozens of various suggestions about this problem like deleting build items or look whether fonts are defined in info.plist or execute 'react-native-link' and etc.However, none of them worked for my case. Also, some people mentioned that, although it does not work through CLI, it works when executed directly through Xcode. Whereas,it did not work for me.  I'm stucked at this problem for almost 5 hours. Finally, I thought maybe someone may helps me, here.</p>
  
  <p>Do you have any suggestion?</p>
  
  <p><a href="https://i.stack.imgur.com/CLIW8.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/CLIW8.png" alt="enter image description here"></a></p>