(#3) patches.create: Ignore hidden angular properties (starting with $$, such as $$hashKeys).
(#3) changelog
Merge branch 'feature-0.9.x/3-ignore-hidden-angular-properties' into release-0.9.x

* feature-0.9.x/3-ignore-hidden-angular-properties:
  (#3) changelog
  (#3) patches.create: Ignore hidden angular properties (starting with $$, such as $$hashKeys).