Update Badges

[JimMadge]

✅ Checklist

• You have given your pull request a meaningful title (e.g. Enable foobar integration rather than 515 foobar).
• You are targeting the develop branch.
• Your branch is up-to-date with the develop branch (you probably started your branch from develop but it may have changed since then).
• If-and-only-if your changes are not yet ready to merge, you have marked this pull request as a draft pull request and added '[WIP]' to the title.
• If-and-only-if you have changed any Powershell code, you have run the code formatter. You can do this with ./tests/AutoFormat_Powershell.ps1 -TargetPath <path to file or directory>.

⤴️ Summary

• Remove Travis CI badge
• Add GitHub workflow badges for linting and tests
• Add citation badge directing to CITATION.cff

🌂 Related issues

🔬 Tests

Preview README.md on this branch.

[edwardchalstrey1]

Looks good apart from the Lint code badge appears to show as failing on this branch even though the actions doesn't have it failing?

[JimMadge]

I think that is because it is getting the state from the default branch (which has failed a html external link check).

[JimMadge]

Re-ran the tests and it is all passing now 👍