Update dependency typescript to v4.2.2

Editor assessment

Updating typescript to v4.2.2 is stated exactly, with chore(deps) matching the maintenance bump in type and scope. The subject fully identifies the change, so no diff needs opening. There is no body, appropriate for a compiler version update governed by upstream release notes, and no footers appear, none being owed. Hygiene is clean: imperative mood, no trailing period, compact precise subject, no ticket junk, no pasted material. The message communicates everything a routine dependency update requires and nothing that would distract or mislead.