Remove some dependencies that are unused. Now that we're using an up-to-date ESLint, the constraint on how we resolve glob-parent is redundant, so remove that too.

Update: While we're editing dependencies, I've pushed a commit to address CVE-2023-0842.

Merge / deployment checklist

• Confirm this change is backwards compatible with existing workflows.
• Confirm the readme has been updated if necessary.
• Confirm the changelog has been updated if necessary.