+github.0.8.6

* Fix `pull_action_type` `synchronize` tag typo (avsm/ocaml-github#33 from Philipp Gesang).
* Add a `git create-release` to create a GitHub release, including binary assets
  (avsm/ocaml-github#32 from Markus Mottl).
Merge pull request #2440 from avsm/github.0.8.6

+github.0.8.6
+cow.0.10.1