Bump check-manifest from 0.42 to 0.43

Bumps [check-manifest](https://github.com/mgedmin/check-manifest) from 0.42 to 0.43.
- [Release notes](https://github.com/mgedmin/check-manifest/releases)
- [Changelog](https://github.com/mgedmin/check-manifest/blob/master/CHANGES.rst)
- [Commits](mgedmin/check-manifest@0.42...0.43)

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

Author: dependabot-preview[bot]

dev-requirements.txt

@@ -8,7 +8,7 @@ Sphinx==3.2.1
 VWS-Python-Mock==2019.12.27.0
 VWS-Test-Fixtures==2020.8.2.0
 autoflake==1.4
-check-manifest==0.42
+check-manifest==0.43
 doc8==0.8.1
 dodgy==0.2.1  # Look for uploaded secrets
 flake8-commas==2.0.0  # Require silicon valley commas