1.6.4

What's Changed

• refs #424 / fixed #589 - do not store reference to filelist in simplecpp::Location / added simplecpp::TokenList::file() / cleanups by @firewave in #573
• CI-unixish.yml: removed macos-13 / added macos-15-intel and macos-26 by @firewave in #602
• updated actions/setup-python to v6 by @firewave in #604
• updated actions/checkout to v6 by @firewave in #603
• added @throws to documentation / adjusted some catch handlers by @firewave in #600
• CI-unixish.yml: also run sanitizers on latest macOS by @firewave in #607
• build all code with all available C++ standards in CI by @firewave in #606
• improved simplecpp::TokenList constructors by @firewave in #599

Full Changelog: 1.6.3...1.6.4