Update README.md wrong path for scrollToFocusedInput in Programatically scroll to any TextInput

[piotrgrundas]

Fix path to scrollToFocusedInput in Programatically scroll to any TextInput section.

_scrollToInput (reactNode: any) {
  // Add a 'scroll' ref to your ScrollView
  this.scroll.scrollToFocusedInput(reactNode)
}

this.scroll.scrollToFocusedInput(reactNode)
should be
this.scroll.props.scrollToFocusedInput(reactNode)

[alvaromb]

https://github.com/APSL/react-native-keyboard-aware-scroll-view/releases/tag/v0.7.3