v2.2.0: Enhance `SortedSet` with support for number and string elements

⚠️ POTENTIALLY DISRUPTIVE CHANGES

• Upgrade @typescript-eslint/eslint-plugin from v6.18.0 to v6.19.1, which enables new lint rules in configuration strict-type-checked:
  • @typescript-eslint/no-array-delete
  • @typescript-eslint/prefer-promise-reject-errors

🌎 External changes

• Enhance SortedSet to natively support number and string elements without having to wrap them in Comparable objects.

🏠 Internal changes

• Improve unit tests for utils/ExternallyControlledPromise.

🧹 Chores

• Upgrade dependencies.