Merge pull request facebook#61 from szymonzmyslony/master

Changed return type in backhandler Android so that it overrides default behaviour

Author: wokalski

src/backHandlerRe.re

@@ -1,8 +1,7 @@
-external exitApp : unit => unit =
-  "" [@@bs.scope "BackHandler"] [@@bs.module "react-native"];
+external exitApp : unit => unit = "" [@@bs.scope "BackHandler"] [@@bs.module "react-native"];
 
-external addEventListener : string => (unit => unit) => unit =
+external addEventListener : string => (unit => bool) => unit =
   "" [@@bs.scope "BackHandler"] [@@bs.module "react-native"];
 
-external removeEventListener : string => (unit => unit) => unit =
-  "" [@@bs.scope "BackHandler"] [@@bs.module "react-native"];
+external removeEventListener : string => (unit => bool) => unit =
+  "" [@@bs.scope "BackHandler"] [@@bs.module "react-native"];

src/backHandlerRe.rei

@@ -1,8 +1,7 @@
-external exitApp : unit => unit =
-  "" [@@bs.scope "BackHandler"] [@@bs.module "react-native"];
+external exitApp : unit => unit = "" [@@bs.scope "BackHandler"] [@@bs.module "react-native"];
 
-external addEventListener : string => (unit => unit) => unit =
+external addEventListener : string => (unit => bool) => unit =
   "" [@@bs.scope "BackHandler"] [@@bs.module "react-native"];
 
-external removeEventListener : string => (unit => unit) => unit =
-  "" [@@bs.scope "BackHandler"] [@@bs.module "react-native"];
+external removeEventListener : string => (unit => bool) => unit =
+  "" [@@bs.scope "BackHandler"] [@@bs.module "react-native"];