version 2.4.0

Fixed

• Fix sign-compare warning (@khoitd1997 )
• Allow to install toml11 by CMake (@KerstinKeller )
• Fix definition of _toml operator
• Compare table values correctly

Changed

• Throw toml::type_error from as_xxx
• Add as_xxx(std::nothrow) noexcept overload
• Show hints when it encounters a syntax error

Deprecated

• Deprecate (is|as)_float. Use (is|as)_floating instead.
  • To make it consistent with snake_case typenames