don't uppercase password

fixes Jxck-S/plane-notify#87

defOpenSky.py

@@ -4,7 +4,7 @@ def pull_opensky(planes):
     main_config.read('./configs/mainconf.ini')
     from opensky_api import OpenSkyApi
     planeData = None
-    opens_api = OpenSkyApi(username= None if main_config.get('OPENSKY', 'USERNAME').upper() == "NONE" else main_config.get('OPENSKY', 'USERNAME'), password= None if main_config.get('OPENSKY', 'PASSWORD').upper() == "NONE" else main_config.get('OPENSKY', 'PASSWORD').upper())
+    opens_api = OpenSkyApi(username= None if main_config.get('OPENSKY', 'USERNAME').upper() == "NONE" else main_config.get('OPENSKY', 'USERNAME'), password= None if main_config.get('OPENSKY', 'PASSWORD').upper() == "NONE" else main_config.get('OPENSKY', 'PASSWORD'))
     failed = False
     icao_array = []
     for key in planes.keys():