Update the Conan recipe

[dertuxmalwieder]

As this version is maintained and the ipkn version is not, could you push your fork to Conan one day?
It is not quite great to only have the unmaintained version there.

[The-EDev]

Yes indeed, but I've noticed (and correct me if I'm wrong) that Conan and Conan center are 2 different things, since Crow had a conanfile.py since 2016, it was only added to Conan center back in October (here and here), so I believe the correct course of action would be as follows:

1. Add the conanfile.py again (with updated data).
2. contact the people behind the Issue and PR and ask them to possibly change the URL to this repository as opposed to the unmaintained one.

Edit: on a second review, it seems the conanfile.py used in the center is different from the one in the repository, which means point 1 might not be necessary.

[The-EDev]

https://conan.io/center/crowcpp-crow