Add className to spinner component

[ghrlee]

quick change to the Spinner component to use the className "spinner" in place of id

Author Checklist

• [x] Add unit test(s)
• [ ] Update version in package.json (see the versioning guidelines)
• [x] Update documentation (if necessary)
• [ ] Add story to storybook (if necessary)
• [x] Assign dev reviewer

[chawes13]

Thanks @ghrlee ! Do you need this for a particular project?

[ghrlee]

Thanks @ghrlee ! Do you need this for a particular project?

no, just saw this under available issues :)

[chawes13]

Perfect! I'll aim to respond to this within the next few days :)

[ghrlee]

@chawes13 sorry for the huge delay