Fix the calm wind regex

This PR fixes #61 and the regex of the calm wind which is represented by `00000KT` and not `0000KT`.
Visibility should not be parsed aas wind.

Author: mivek

metar_taf_parser/command/common.py

@@ -79,7 +79,7 @@ def execute(self, container: AbstractWeatherContainer, visibility_string: str):
 
 
 class WindCommand:
-    regex = r'^(VRB|00|[0-3]\d{2})(\d{2})G?(\d{2,3})?(KT|MPS|KM\/H)?'
+    regex = r'^(VRB|000|[0-3]\d{2})(\d{2})G?(\d{2,3})?(KT|MPS|KM\/H)?'
 
     def __init__(self):
         self._pattern = re.compile(WindCommand.regex)

metar_taf_parser/tests/parser/test_parser.py

@@ -290,7 +290,7 @@ def test_parse_runway_deposit(self):
 
     def test_parse_empty_wind(self):
 
-        metar = MetarParser().parse('KATW 022045Z 0000KT 10SM SCT120 00/M08 A2996')
+        metar = MetarParser().parse('KATW 022045Z 00000KT 10SM SCT120 00/M08 A2996')
 
         self.assertEqual('KATW', metar.station)
         self.assertIsNotNone(metar.wind)