Bump pyupgrade from 2.7.2 to 3.19.0 (#61)

Bumps [pyupgrade](https://github.com/asottile/pyupgrade) from 2.7.2 to 3.19.0.
- [Commits](asottile/pyupgrade@v2.7.2...v3.19.0)

---
updated-dependencies:
- dependency-name: pyupgrade
  dependency-type: direct:production
  update-type: version-update:semver-major
...

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

Author: dependabot[bot]

requirements.txt

@@ -9,7 +9,7 @@ pylint
 
 # pre-commit
 pre-commit==2.7.1
-pyupgrade==2.7.2
+pyupgrade==3.19.0
 black==20.8b1
 flake8==3.8.3
 # flake8-docstrings==1.5.0