Version 1.1

Changelog:

• Added -DNO_ASSERT_RELEASE_EVAL to make ASSERT behave more like traditional C assert
• Renamed library's namespace to libassert::
• Added customization point for libassert::detail::stringify
• Added support for assertions in constexpr functions
• Some internal refactoring, bug fixes, and typo corrections
• Better cmake, big thanks to @qdewaghe!