v4.0.0

Full Changelog
Protocol Documentation

Closed issues:

• sbp.dll doesnt export symbols #1062

Merged pull requests:

• rust: Use minimum internal buffer size of 128b #1080 (silverjam)
• rust: add len method to SbpMessage #1078 (notoriaga)
• expose parsing messages from frames #1075 (notoriaga)
• clang-tidy improvements #1074 (woodfell)
• rust: update to swiftnav 0.6.1 #1073 (silverjam)
• rust: release cleanup #1071 (notoriaga)
• Rust: callback based message handler #1070 (notoriaga)
• windows dll update #1069 (RReichert)
• Fix windows library install directory #1061 (RReichert)
• Dockerfile: Use Ubuntu focal #1059 (jayvdb)
• Fix spelling and copyright year #1058 (jayvdb)
• Portability project #1000 (RReichert)