version 4.1.0

Added

• support std::get<std::u8string>
• support toml::value(std::u8string)
• support string_type = std::u8string in config type
• support operator<<(std::ostream&, toml::value)
• add bool uppercase to toml::integer_format
• support template into_toml() (#255) (#256) (by 萧迩珀 @CDK6182CHR)

Fixed

• Fix not checking for \r\n when parsing line comments (#252) (#253) (by Andreas Keller @andreaskeller96)

Changed

• speedup CI tests by multicore build