Add contributors

[irm-codebase]

Giving credit where credit is due

[irm-codebase]

@all-contributors please add @irm-codebase for ideas, code, doc, maintenance

[allcontributors]

@irm-codebase

I've put up a pull request to add @irm-codebase! 🎉

[irm-codebase]

@all-contributors please add @sjpfenninger for review, projectManagement

[allcontributors]

@irm-codebase

I've put up a pull request to add @sjpfenninger! 🎉

[irm-codebase]

@all-contributors please add @FraSanvit for code

[allcontributors]

@irm-codebase

I've put up a pull request to add @FraSanvit! 🎉