tox
and `docker run` complete with this
```
swh@60d6fea3afe1:/$ swh lister run -l maven url=https://repo1.maven.org/maven2/ index_url=http://swh-lister-maven-nginx/export.fld
INFO:swh.lister.maven.lister:Downloading text index from http://swh-lister-maven-nginx/export.fld.
INFO:swh.lister.maven.lister:Found 2 poms.
INFO:swh.lister.maven.lister:Fetching poms..
INFO:swh.lister.maven.lister:Fetching URL https://repo1.maven.org/maven2/al/aldi/sprova4j/0.1.0/sprova4j-0.1.0.pom with params {}
INFO:swh.lister.maven.lister:Fetching URL https://repo1.maven.org/maven2/al/aldi/sprova4j/0.1.1/sprova4j-0.1.1.pom with params {}
```