Loading component

[jovergaag]

Description of the change

Adds a Loading spinner component.

I also updated license-header.js to 2021, which then exploded out to all of the files so it will be best to review this commit by commit. I'm also happy to move the header commit into another PR/tag.

Type of change

• Bug fix (non-breaking change that fixes an issue)
• New feature (non-breaking change that adds functionality)
• Breaking change (fix or feature that would cause existing functionality to not work as expected)
• Configuration change (adjusts configuration to achieve some end related to functionality, development, performance, or security)

Related issues

Part of #1220 and #7

Checklists

Development

These boxes should be checked by the submitter prior to merging:

• Manual testing against realistic data has been performed locally

Code review

These boxes should be checked by reviewers prior to merging:

• This pull request has a descriptive title and information useful to a reviewer
• This pull request has been moved out of a Draft state, has no "Work In Progress" label, and has assigned reviewers
• Potential security implications or infrastructural changes have been considered, if relevant

[macfarlandian]

See #7 on the license issue, though I wouldn't necessarily say that this closes that.

Could you add the Loading spinner to Storybook also?

[jovergaag]

@macfarlandian Added to Storybook!

I agree that this doesn't close #7, but is a step in that direction.

Ready for another review.

[macfarlandian]

🪐