When running on Python 3.7, the logparser cron job generates a FutureWarning:
<path>/modoboa_stats/management/commands/logparser.py:100: FutureWarning: Possible nested set at position 29
self._regex = {k: re.compile(v) for k, v in self._regex.items()}
When running on Python 3.7, the logparser cron job generates a FutureWarning: