Bump py from 1.8.1 to 1.10.0 (#307)

Bumps [py](https://github.com/pytest-dev/py) from 1.8.1 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@1.8.1...1.10.0)

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

Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

requirements.txt

@@ -15,7 +15,7 @@ pandas==0.25.3
 pluggy==0.13.1
 pvlib==0.7.1
 pvmismatch==4.1
-py==1.8.1
+py==1.10.0
 pyparsing==2.4.7
 pytest==5.4.1
 pytest-cov==2.8.1