Housekeeping

[barmac]

Proposed Changes

1. Migrated to eslint@9
2. Removed sinon which we did not use
3. Updated deps
4. Added setup action to mitigate sandboxing problem

Checklist

To ensure you provided everything we need to look at your PR:

• Brief textual description of the changes present
• Visual demo attached
• Steps to try out present, i.e. using the @bpmn-io/sr tool
• Related issue linked via Closes {LINK_TO_ISSUE} or Related to {LINK_TO_ISSUE}

[nikku]

Awesome ⭐