Update greenlet to 1.1.2

[pyup-bot]

This PR updates greenlet from 1.1.1 to 1.1.2.

Changelog

1.1.2

==================

- Fix a potential crash due to a reference counting error when Python
subclasses of ``greenlet.greenlet`` were deallocated. The crash
became more common on Python 3.10; on earlier versions, silent
memory corruption could result. See `issue 245
<https://github.com/python-greenlet/greenlet/issues/245>`_. Patch by
fygao-wish.
- Fix a leak of a list object when the last reference to a greenlet
was deleted from some other thread than the one to which it
belonged. For this to work correctly, you must call a greenlet API
like ``getcurrent()`` before the thread owning the greenlet exits:
this is a long-standing limitation that can also lead to the leak of
a thread's main greenlet if not called; we hope to lift this
limitation. Note that in some cases this may also fix leaks of
greenlet objects themselves. See `issue 251
<https://github.com/python-greenlet/greenlet/issues/251>`_.
- Python 3.10: Tracing or profiling into a spawned greenlet didn't
work as expected. See `issue 256
<https://github.com/python-greenlet/greenlet/issues/256>`_, reported
by Joe Rickerby.

Links

• PyPI: https://pypi.org/project/greenlet
• Changelog: https://pyup.io/changelogs/greenlet/
• Docs: https://greenlet.readthedocs.io/