v0.4.5

This is pgx v0.4.5 It's generally a minor release without backwards incompatible changes.

As usual, make sure to run cargo install cargo-pgx.

What's Changed

• Lockdown semver on pgx deps by @Hoverbear in #559
• Annotate and refactor pgx-tests by @workingjubilee in #563
• Clone less while beginning to unwind by @workingjubilee in #564
• Do not use CREATE OR REPLACE FUNCTION by @Hoverbear in #554
• Remove dubious thread assertion by @workingjubilee in #562
• Pre-patch fixes by @workingjubilee in #568
• Bump to v0.4.5 by @workingjubilee in #569

Full Changelog: v0.4.4...v0.4.5