v2.9.4

Reduced the output length of compile time errors.

Fixes

• Fixing glz::format_error with no buffer by @stephenberry in #1129

Improvements

• Packing internal options for shorter compile time errors by @stephenberry in #1125
• using uint8_t alias for opts by @stephenberry in #1126
• Adding target_extension to read_directory by @stephenberry in #1128
• Silence MSVC warning about including <expected> by @helmesjo in #1130

Full Changelog: v2.9.3...v2.9.4