version 1.16.0

• Bump bundled {fmt} library to 12.0.0
• Use std::getenv #3414 by @kfeng123 in #3415
• Remove unnecessary and inconsistent "final" from color sinks by @vadz in #3430
• Fix ringbuffer sink for zero buffer size by @gabime in #3436
• Add option to override CMAKE_DEBUG_POSTFIX by @joshuachp in #3433
• Update README.md by @yalov in #3437
• Added timeout for TCP calls such as connect, send, recv by @LowLevelLore in #3432
• Run tests in the order they are declared by @xvitaly in #3451
• Remove the fileapi.h include in os-inl.h by @MasonAngelio in #3444

Full Changelog: v1.15.3...v1.16.0

Special thanks to @tt4g for assisting with community questions and issues.