Update version to 0.16.1

[eeeebbbbrrrr]

Welcome to pgrx v0.16.1. This is a relatively minor release but does add support for Postgres v18, released on September 25, 2025.

As always, install/update cargo-pgrx with cargo install cargo-pgrx --version 0.16.1 --locked. Then run cargo pgrx update in all your extension crates.

To pick up Postgres v18, you'll need to run (at least) cargo pgrx init and then add the pg18 feature flag to your extension's Cargo.toml.

What's Changed

• remove polyfill crates by @usamoi in remove polyfill crates #2128
• Example : register PostgreSQL hooks by @daamien in Example : register PostgreSQL hooks #2125
• add more WAL/replication headers by @eeeebbbbrrrr in add more WAL/replication headers #2130
• remove home, supports-color 0.2 and update toml, color-eyre by @usamoi in remove home, supports-color 0.2 and update toml, color-eyre #2133
• cargo-pgrx: fix pg_regress path inconsistency by @charmitro in cargo-pgrx: fix pg_regress path inconsistency #2137
• fix big endian by @usamoi in fix big endian #2132
• Fixing CI by @eeeebbbbrrrr in Fixing CI #2143
• pg18 support by @eeeebbbbrrrr in pg18 support #2144

Full Changelog: v0.16.0...v0.16.1