Bump flake8-builtins from 1.4.1 to 1.5.2
Bump flake8-builtins from 1.4.1 to 1.5.2

Bumps [flake8-builtins](https://github.com/gforcada/flake8-builtins) from 1.4.1 to 1.5.2.
- [Release notes](https://github.com/gforcada/flake8-builtins/releases)
- [Changelog](https://github.com/gforcada/flake8-builtins/blob/master/CHANGES.rst)
- [Commits](https://github.com/gforcada/flake8-builtins/compare/1.4.1...1.5.2)

Signed-off-by: dependabot-preview[bot] <5bdcd3c0d4d24ae3e71b3b452a024c6324c7e4bb@dependabot.com>
django-haystack/pysolr,django-haystack/pysolr,toastdriven/pysolr,toastdriven/pysolr