Defer the callback to the next tick.

This gives GitRepository the chance to clear its path cache before the callback 
is invoked. Otherwise reads from the cached status state within the callback 
would be wrong.

src/git-repository.coffee

@@ -166,7 +166,12 @@ class GitRepository
   #
   # Returns a {Disposable} on which `.dispose()` can be called to unsubscribe.
   onDidChangeStatuses: (callback) ->
-    @async.onDidChangeStatuses callback
+    @async.onDidChangeStatuses ->
+      # Defer the callback to the next tick so that we've reset
+      # `@statusesByPath` by the time it's called. Otherwise reads from within
+      # the callback could be inconsistent.
+      # See https://github.com/atom/atom/issues/11396
+      process.nextTick callback
 
   ###
   Section: Repository Details