chore(release): prepare v0.2.1

[phil-accelbyte]

Bump version 0.2.0 → 0.2.1 for the patch release.

Bug fixes included in 0.2.1:

• fix(auth): measure Windows keychain limit in UTF-16 bytes and clear stale entry on fallback #12 — Windows keychain: measure the limit in UTF-16 bytes and clear stale entries on fallback (fixes "Session expired and token refresh failed" on Windows).
• fix(auth): fall back to file storage on any keychain init failure #13 — fall back to file storage on any keychain init failure (fixes auth login in containers; ENOSYS/EPERM).
• fix(dispatch): render scalar-array list responses as a named column #14 — render scalar-array list responses as a named column (fixes ams info list-regions showing nothing).
• fix(shape): promote appName to priority-1 field in list tables #15 — promote appName to a priority-1 field in list tables.
• fix: refresh user token on public iam client #16 — refresh user token on public IAM clients (fixes refresh for browser-login profiles).