Bump flake8-builtins from 1.4.1 to 1.4.2

Bumps [flake8-builtins](https://github.com/gforcada/flake8-builtins) from 1.4.1 to 1.4.2.
- [Release notes](https://github.com/gforcada/flake8-builtins/releases)
- [Changelog](https://github.com/gforcada/flake8-builtins/blob/master/CHANGES.rst)
- [Commits](gforcada/flake8-builtins@1.4.1...1.4.2)

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