Update gevent to 1.1.2

[pyup-bot]

There's a new version of gevent available.
You are currently using 1.1.0. I have updated it to 1.1.2

Changelog

1.1.1

• Nested callbacks that set and clear an Event no longer cause
  wait to return prematurely. Reported in :issue:771 by Sergey
  Vasilyev.
• Fix build on Solaris 10. Reported in :issue:777 by wiggin15.
• The ref parameter to :func:gevent.os.fork_and_watch was being ignored.
• Python 3: :class:gevent.queue.Channel is now correctly iterable, instead of
  raising a :exc:TypeError.
• Python 3: Add support for :meth:socket.socket.sendmsg,
  :meth:socket.socket.recvmsg and :meth:socket.socket.recvmsg_into
  on platforms where they are defined. Initial :pr:773 by Jakub
  Klama.

Got merge conflicts? Close this PR and delete the branch. I'll create a new PR for you.

Happy merging! 🤖

[codecov-io]

Current coverage is 100% (diff: 100%)

Merging #116 into master will not change coverage

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