v0.5.1: Support kubeconfigs with `exec` plugins
- Run CI on Deno v1.26 thru v1.32.
- Now supports 'exec' plugins in kubeconfigs to load temporary credentials.
- This new feature requires Deno v1.31 or later (or Deno v1.28 with
--unstable
). - Note that Deno still has unrelated incompatibilities with GKE's IP-based TLS.