0.9.4

Switching back to libpg_query with PG17 parser due to some regressions in the PG18 parser.

What's Changed

• Run timescaledb workflow on all PRs by @svenklemm in #266
• Downgrade pglast to 7.21 by @svenklemm in #267
• pgspot 0.9.4 by @svenklemm in #268

Full Changelog: 0.9.3...0.9.4