Added defs for Flow 0.53 (thanks mwiencek!)

README.md

@@ -266,7 +266,7 @@ to lint your code.
 
 ### FlowType
 There's still not a perfect solution for FlowType given that it doesn't provide a lot of plugin functionality
-(at least not yet). Flow definitions are available in `jsx-control-statements.flow.js`, which will stop the
+(at least not yet). Flow definitions are available in `jsx-control-statements.latest.flow.js` for Flow >= 0.53, or `jsx-control-statements.flow.js` (deprecated) for Flow < 0.53. These will stop the
 type checker complaining about statements being undeclared. As of now there's no neat way to make the Flow checker
 recognise `each` attributes in `<For>` loops as a variable - the best workaround for now is something like:
 

jsx-control-statements.flow.js

@@ -1,7 +1,11 @@
 // @flow
 
-declare var If: ReactClass<{condition: boolean}>;
-declare var For: ReactClass<{each: string, index: string, of: Array<any>}>;
+// DEPRECATION NOTICE: If you're using Flow >= 0.53 please use the defs in the
+// jsx-control-statements.latest.flow.js file. These are deprecated and will
+// eventually be replaced by the defs in that file.
+
+declare var If: ReactClass<{ condition: boolean }>;
+declare var For: ReactClass<{ each: string, index: string, of: Array<any> }>;
 declare var Choose: ReactClass<{}>;
-declare var When: ReactClass<{condition: boolean}>;
+declare var When: ReactClass<{ condition: boolean }>;
 declare var Otherwise: ReactClass<{}>;

jsx-control-statements.latest.flow.js

@@ -0,0 +1,7 @@
+// @flow
+
+declare var If: React$ComponentType<{condition: boolean}>;
+declare var For: React$ComponentType<{each: string, index: string, of: Array<any>}>;
+declare var Choose: React$ComponentType<{}>;
+declare var When: React$ComponentType<{condition: boolean}>;
+declare var Otherwise: React$ComponentType<{}>;