tox
actually run it within docker:
```
11:08:51 swh-scheduler@localhost:5433=# select * from listers;
+--------------------------------------+---------------+-------------------------------------+-------------------------------+---------------+-------------------------------+
| id | name | instance_name | created | current_state | updated |
+--------------------------------------+---------------+-------------------------------------+-------------------------------+---------------+-------------------------------+
| 815d8f84-804c-4e9a-ab2e-9b08c1dae02d | save-code-now | archive-docker.softwareheritage.org | 2021-07-09 08:26:27.221771+00 | {} | 2021-07-09 08:26:27.221771+00 |
| aab1eb6b-1f3d-4227-ae7a-24113ed8c22e | pypi | pypi | 2021-07-09 08:34:56.26739+00 | {} | 2021-07-09 08:34:56.26739+00 |
+--------------------------------------+---------------+-------------------------------------+-------------------------------+---------------+-------------------------------+
(2 rows)
Time: 0.578 ms
11:10:27 swh-scheduler@localhost:5433=# select * from listed_origins;
...
+-[ RECORD 12678 ]-------+----------------------------------------------------------------------------------------------------------------------+
| lister_id | aab1eb6b-1f3d-4227-ae7a-24113ed8c22e |
| url | https://pypi.org/project/message/ |
| visit_type | pypi |
| extra_loader_arguments | {} |
| enabled | t |
| first_seen | 2021-07-09 09:08:50.61344+00 |
| last_seen | 2021-07-09 09:08:50.61344+00 |
| last_update | 2011-01-13 11:43:17+00 |
+-[ RECORD 12679 ]-------+----------------------------------------------------------------------------------------------------------------------+
| lister_id | aab1eb6b-1f3d-4227-ae7a-24113ed8c22e |
| url | https://pypi.org/project/pytest-pep8/ |
| visit_type | pypi |
| extra_loader_arguments | {} |
| enabled | t |
| first_seen | 2021-07-09 09:08:50.61344+00 |
| last_seen | 2021-07-09 09:08:50.61344+00 |
| last_update | 2010-12-06 15:38:50+00 |
+------------------------+----------------------------------------------------------------------------------------------------------------------+
```