2.0.1

• fix missing <cstring> include in argument.hpp

1.1.2

• fix missing <cstring> include in argument.hpp

2.0.0

BREAKING CHANGE

Avoid matching empty strings in ArgumentParser::exists() method.

This can be considered a bug or a feature, depending on how you use this library.
Matching against empty strings is no longer possible, but it is also a breaking change.
For that reason the major version number was increased to 2.

1.1.1

• initial release