Create SECURITY.md (#111)

Create SECURITY.md (#111)

* Create SECURITY.md

I'd like to report a security issue but cannot find contact instructions on your repository.

If not a hassle, might you kindly add a SECURITY.md file with an email, or another contact method? GitHub [recommends](https://docs.github.com/en/code-security/getting-started/adding-a-security-policy-to-your-repository) this best practice to ensure security issues are responsibly disclosed, and it would serve as a simple instruction for security researchers in the future.

Thank you for your consideration!

* Update SECURITY.md

Co-authored-by: Johan Cwiklinski <trasher@x-tnd.be>