replace uses of pkg_resources

[yarikoptic]

we got

FAILED ../core/local/tests/test_create.py::test_create_withcfg - DeprecationWarning: pkg_resources is deprecated as an API. See https://setuptools.pypa.io/en/latest/pkg_resources.html
FAILED ../core/local/tests/test_create.py::test_bad_cfg_proc - DeprecationWarning: pkg_resources is deprecated as an API. See https://setuptools.pypa.io/en/latest/pkg_resources.html
FAILED ../local/tests/test_addurls.py::TestAddurls::test_addurls_create_newdataset - DeprecationWarning: pkg_resources is deprecated as an API. See https://setuptools.pypa.io/en/latest/pkg_resources.html
FAILED ../local/tests/test_addurls.py::TestAddurls::test_addurls_subdataset - DeprecationWarning: pkg_resources is deprecated as an API. See https://setuptools.pypa.io/en/latest/pkg_resources.html
FAILED ../local/tests/test_run_procedure.py::test_run_proc_with_dict - DeprecationWarning: pkg_resources is deprecated as an API. See https://setuptools.pypa.io/en/latest/pkg_resources.html
FAILED ../resources/procedures/tests/test_noannex.py::test_noannex_simple - DeprecationWarning: pkg_resources is deprecated as an API. See https://setuptools.pypa.io/en/latest/pkg_resources.html
FAILED ../resources/procedures/tests/test_noannex.py::test_noannex_create_force - DeprecationWarning: pkg_resources is deprecated as an API. See https://setuptools.pypa.io/en/latest/pkg_resources.html
FAILED ../local/tests/test_run_procedure.py::test_invalid_call - DeprecationWarning: pkg_resources is deprecated as an API. See https://setuptools.pypa.io/en/latest/pkg_resources.html
FAILED ../local/tests/test_run_procedure.py::test_dirty - DeprecationWarning: pkg_resources is deprecated as an API. See https://setuptools.pypa.io/en/latest/pkg_resources.html
FAILED ../local/tests/test_run_procedure.py::test_procedure_discovery - DeprecationWarning: pkg_resources is deprecated as an API. See https://setuptools.pypa.io/en/latest/pkg_resources.html
FAILED ../local/tests/test_run_procedure.py::test_configs - DeprecationWarning: pkg_resources is deprecated as an API. See https://setuptools.pypa.io/en/latest/pkg_resources.html
FAILED ../local/tests/test_run_procedure.py::test_spaces - DeprecationWarning: pkg_resources is deprecated as an API. See https://setuptools.pypa.io/en/latest/pkg_resources.html
FAILED ../local/tests/test_run_procedure.py::test_text2git - DeprecationWarning: pkg_resources is deprecated as an API. See https://setuptools.pypa.io/en/latest/pkg_resources.html

for which I will workaround by ignoring it for now, but should be addressed properly following the recommendations.

[yarikoptic-gitmate]

Issue fixed in 0.19.3