Add q as allowed identifier in eslint

[ianks]

Description

q is a common identifier for a search query param, and it used in many apps across Shopify.

Previously, we had to do this:

// eslint-disable-next-line
const { data, loading, error } = useSearchPackages({ q: "foo" })

This patch makes it less painful to use q in Javascript-land.

Type of change

• @shopify/eslint-plugin Patch: Bug (non-breaking change which fixes an issue)
• @shopify/eslint-plugin Minor: New feature (non-breaking change which adds functionality)
• @shopify/eslint-plugin Major: Breaking change (fix or feature that would cause existing functionality to not work as expected)

Checklist

• I have added a changelog entry, prefixed by the type of change noted above (Documentation fix and Test update does not need a changelog as we do not publish a new version for these changes)

[ianks]

Couldn't figure out the changelog test... but here's what I was going to add if it helps:

### Changed

- Allow usage of `q` variable in `id-length` rule [[#329](https://github.com/Shopify/web-configs/pull/329)]

[BPScott]

@ianks Regarding the changelog - uncomment the ## Unreleased header, in addition to adding the content in your comment

[BPScott]

I took the liberty of pushing up the correction to the chnagelog.

Thanks!

[BPScott]

Published as 41.2.1!