Bump py from 1.5.3 to 1.10.0

Bumps [py](https://github.com/pytest-dev/py) from 1.5.3 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@1.5.3...1.10.0)

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

requirements.txt

@@ -15,7 +15,7 @@ mccabe==0.6.1
 nose==1.3.7
 packaging==17.1
 pluggy==0.6.0
-py==1.5.3
+py==1.10.0
 pycodestyle==2.3.1
 pyflakes==1.6.0
 Pygments==2.2.0