Fix event function types (#121)

Author: spicydonuts

src/React.js

@@ -207,11 +207,15 @@ function createFactory(class_) {
 exports.createFactory = createFactory;
 
 function preventDefault(event) {
-  return function() { return event.preventDefault();}
+  return function() {
+    event.preventDefault();
+  };
 };
 exports.preventDefault = preventDefault;
 
 function stopPropagation(event) {
-  return function() { return event.stopPropagation();}
+  return function() {
+    event.stopPropagation();
+  };
 };
 exports.stopPropagation = stopPropagation;

src/React.purs

@@ -465,6 +465,6 @@ foreign import data Children :: Type
 -- | Internal conversion function from children elements to an array of React elements
 foreign import childrenToArray :: Children -> Array ReactElement
 
-foreign import preventDefault :: forall eff a. Event -> Eff eff a
+foreign import preventDefault :: forall eff. Event -> Eff eff Unit
 
-foreign import stopPropagation :: forall eff a. Event -> Eff eff a
+foreign import stopPropagation :: forall eff. Event -> Eff eff Unit