default config file name

Is your feature request related to a problem? Please describe.
The doc say i should create a YAML config file, but not how to name it. https://bandit.readthedocs.io/en/latest/config.html

Describe the solution you'd like
Please recommend a sane default name, so it is consistent in any project and can be found by CI etc.

I recommend using .bandit.yml because it is hidden on Linux, UNIX and macOS and has an extension.

Describe alternatives you've considered
I don't see any alternatives. Leaving it as is leads to chaos!

Additional context
Codacy says: "You can also use custom .bandit or bandit.yml config file."
I have also seen bandit.yaml in earlier issues.

For a sane solution, i look what similar tools do.

Most .name for INI-style config or .name.yml for YAML config.

pylintrc or .pylintrc: https://pylint.readthedocs.io/en/latest/user_guide/run.html#command-line-options

.flake8

.pycodestyle or config in setup.cfg or tox.ini: http://pycodestyle.pycqa.org/en/latest/intro.html#configuration

.pydocstyle, .pydocstyle.ini, .pydocstylerc, .pydocstylerc.ini: http://www.pydocstyle.org/en/2.1.1/usage.html#configuration-files

.coveragerc

.travis.yml, .circleci, .github, .appveyor.yml

Start with the configuration documentation at bandit.readthedocs.io/en/latest/config.html and inspect how Bandit currently discovers configuration files. Compare the documented behavior with the naming options listed in the issue; done means one default filename is agreed on and the documentation and CI guidance consistently recommend it.