message: Added typings for the back handler context
diff: -import { Component, ReactNode } from 'react';
  -import { ImageRequireSource, ImageURISource, StyleProp, ViewStyle } from 'react-native';
  +import { Component, Context, ReactNode } from 'react';
  +import { BackHandler, ImageRequireSource, ImageURISource, StyleProp, ViewStyle } from 'react-native';
  import { StateNavigator, State } from 'navigation';
  /**
  @@ -193,6 +193,11 @@ export interface SharedElementAndroidProps {
  */
  export class SharedElementAndroid extends Component<SharedElementAndroidProps> {}
  +/**
  + * The context for overriding default hardware back handling
  + */
  +export var BackHandlerContext: Context<BackHandler>;
  +
  /**
  * Defines the Tab Bar Item Props contract
  */
  