message: Note service inheritance support in CHANGELOG
diff: @@ -21,6 +21,7 @@ different versioning scheme, following the Haskell community's
  ### `gbc` and Bond compiler library ###
  +* IDL support for service inheritance syntax
  * C++ codegen now generates
  [extern templates](http://en.cppreference.com/w/cpp/language/function_template)
  of `bond::Apply` instead of overloads.
  