Add bandit workflow

[Andrew Montanez]

Problem Description

As a developer, it would be useful to get a static code analysis of our library every so often so we aren't accidently introducing known vulnerabilities.

Expected behavior

• Add a Github Actions workflow that runs when a release is made. This action should
  • Run Bandit
  • Store the output as a file at the base level of the repo
• Make sure the file doesn't get included when creating the package for Copulas

Additional context

• See this PR for inspiration
  Bandit is an open sourced tool that can be used to scan python code for vulnerabilities.