Bump py from 1.8.0 to 1.10.0 in /test/py

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](https://github.com/pytest-dev/py/compare/1.8.0...1.10.0)

---
updated-dependencies:
- dependency-name: py
  dependency-type: direct:production
...

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

test/py/requirements.txt

@@ -9,7 +9,7 @@ more-itertools==7.2.0
 packaging==19.2
 pbr==5.4.3
 pluggy==0.13.0
-py==1.8.0
+py==1.10.0
 pyparsing==2.4.2
 pytest==5.2.1
 python-mimeparse==1.6.0