Adapt cli declaration entrypoint to swh.core 0.3

requirements-swh.txt

@@ -1,2 +1,2 @@
-swh.core >= 0.0.77
+swh.core >= 0.3
 swh.scheduler >= 0.0.58

setup.py

@@ -53,7 +53,7 @@ setup(
     include_package_data=True,
     entry_points="""
         [swh.cli.subcommands]
-        lister=swh.lister.cli:lister
+        lister=swh.lister.cli
         [swh.workers]
         lister.bitbucket=swh.lister.bitbucket:register
         lister.cgit=swh.lister.cgit:register

swh/lister/cli.py

@@ -12,7 +12,7 @@ import os
 
 import click
 
-from swh.core.cli import CONTEXT_SETTINGS
+from swh.core.cli import CONTEXT_SETTINGS, swh as swh_cli_group
 from swh.lister import LISTERS, SUPPORTED_LISTERS, get_lister
 
 logger = logging.getLogger(__name__)
@@ -38,7 +38,7 @@ DEFAULT_TASK_TYPE = {
 }
 
 
-@click.group(name="lister", context_settings=CONTEXT_SETTINGS)
+@swh_cli_group.group(name="lister", context_settings=CONTEXT_SETTINGS)
 @click.option(
     "--config-file",
     "-C",