title: React-native-navigation animate popping a screen?
body: <p>So I have a react-native app which is using react-native-navigation.
  Whenever I click a <code>card</code> in my app, it pushes me the card screen. </p>
  
  <p>What I want to achieve is the following: when swiping down from that screen, as you swipe down the screen gets smaller and the other one is in the background, but I haven't found anything that can help me with that, any packages? Also, I'd have to pop the current screen to have the other one the background, but if I pop it, the current screen can't stay and get smaller as i swipe down.
  So basically I need to animate a component pop.</p>