Bump py from 1.8.0 to 1.10.0

Bumps [py](https://github.com/pytest-dev/py) from 1.8.0 to 1.10.0.
- [Release notes](https://github.com/pytest-dev/py/releases)
- [Changelog](https://github.com/pytest-dev/py/blob/master/CHANGELOG.rst)
- [Commits](pytest-dev/py@1.8.0...1.10.0)

Signed-off-by: dependabot[bot] <support@github.com>

requirements-dev.txt

@@ -23,7 +23,7 @@ pathtools==0.1.2
 pluggy==0.13.1
 pre-commit==1.20.0
 pudb==2019.2
-py==1.8.0
+py==1.10.0
 pycodestyle==2.5.0
 pyflakes==2.1.1
 Pygments==2.5.2