[Question] Contribution Guidelines

[kevinmatthes]

Dear maintainers,

I would like to adjust the Fortran syntax highlighting configuration file but I was unsure which conventions should be taken into account when editing existing files. Since there is no CONTRIBUTING.md in the repository root, I would like to ask you with this issue before making changes.

The reason why I would like to adjust the Fortran configuration is that it only supports Fortran 95. I would like to add some keywords and intrinsic functions in order to support some features of newer standards, especially the latest one: Fortran 2018. In case my Pull Request, #102, should be accepted, I would also add the used literature for this update to the list of references of this repository.