Adds IO::Notification::Chane to typegraph refs #475

Author: JJ

type-graph.txt

@@ -181,6 +181,7 @@ class IO::Spec::Win32               is IO::Spec::Unix
 class IO::Spec::Cygwin              is IO::Spec::Unix
 class IO::Spec::QNX                 is IO::Spec::Unix
 class IO::Notification
+class IO::Notification::Change
 class Proc
 
 [Domain-Specific]