Bugfix:
- Fix memory allocation on postgres 12 and above (Julien Rouhaud)
New features:
- Expose some structures and add a counters hook so other extensions can
extend this extension's metrics (Sviatoslav Ermilin)
Miscellaneous:
- Various improvements to the debian packaging (Christoph Berg)
- Add compatibility with postgres 15 (Julien Rouhaud)
- Improve extension update documentation (Julien Rouhaud)