version 4.3.0

Added

• Support std::optional as a template argument of toml::find
• Support multiple arguments toml::visit(visitor, args...)

Fixed

• toml::detail::region::last_ may be used uninitialized (#267) (#268) (by amatej @kontura)
• Fix use with CMake 3.21 and older (#271) (by Severin Leonhardt @SeverinLeonhardt)
• fix: prevent size_t-max length string allocation (#275) (#276) (by @hayt)
• update README.md (#277) (by somebody @oldoldtea) (by lz)
• Make parsing faster for very long line (#278)
• Avoid known problem in MSVC (#279)
• Check if source_location::file_name() is null before formatting

Changed

• Update hugo-book theme
• Add MSVC 2017 to appveyor build