GitLab

refactor: Update the shell script that build wheels

- Update Gecode version to the last one
- To build rql wheels, starts with Python 3.7 version
- Use pip flag --use-feature=in-tree-build, and deal with the following warning:

    DEPRECATION: A future pip version will change local packages to be built
    in-place without first copying to a temporary directory. We recommend you use
    --use-feature=in-tree-build to test your packages with this new behavior
    before it becomes the default.
       pip 21.3 will remove support for this functionality. You can find
    discussion regarding this at https://github.com/pypa/pip/issues/7555.