Bump wheel from 0.33.6 to 0.38.1

Bumps [wheel](https://github.com/pypa/wheel) from 0.33.6 to 0.38.1.
- [Release notes](https://github.com/pypa/wheel/releases)
- [Changelog](https://github.com/pypa/wheel/blob/main/docs/news.rst)
- [Commits](https://github.com/pypa/wheel/compare/0.33.6...0.38.1)

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

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

requirements.txt

@@ -1,6 +1,6 @@
 pip==19.2.3
 bump2version==0.5.11
-wheel==0.33.6
+wheel==0.38.1
 watchdog==0.9.0
 flake8==3.7.8
 tox==3.14.0

requirements_dev.txt

@@ -1,6 +1,6 @@
 pip==19.2.3
 bump2version==0.5.11
-wheel==0.33.6
+wheel==0.38.1
 watchdog==0.9.0
 flake8==3.7.8
 tox==3.14.0