This is a major release that includes the following new features:
- Utf16 strings codepoint iteration and appending: #91 (special thanks to @ceztko)
- Support for u8string (thanks to @XCI9)
- find_invalid and is_valid for C-style strings
There was also a complete overhaul of the CMake build system - testing is now not included in the main CMakeList.txt file and is not a part of the "build".