eslint no single char vars

What is the new behaviour?

added id-length rule to eslint. Variable names must now be minimum two characters long.

Additional Context

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MR Author Checklist

Please check off all that apply:

• Added documentation/comments for any API endpoints, reusable code, and complex code
• Information is being logged for debugging
• All new variables are set
• Any new manual resources are provisioned
• If feature work, is targetted to feature branch
• Code follows code standards
• Added unit tests - required for:
  • New projects
  • New features in legacy projects
  • Major refactors in legacy projects
  • Bug fixes, small refactors and easily testable code (not required, at developer's discretion)

Notes: (Anything else the reviewer needs to know about the points above)

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Reviewer Checklist

• Check that the right branch is targeted (master/feature)
• Confirm that the MR author followed all needed steps above