MESOW error?

```
Traceback (most recent call last):
  File "/data2/noaa/parse_noaa_wind.py", line 67, in <module>
    if 'METAR' not in str(report.report_type) and 'SYNOP' not in str(report.report_type):
  File "/home/tom/.local/lib/python3.10/site-packages/ish_parser/ReportType.py", line 45, in __str__
    return self.MAP[self._obs_value]
KeyError: 'MESOW'
```