Merge pull request #30 from Meisterschueler/revert-28-dependabot/pip/ogn-client-0.9.3

Revert "Bump ogn-client from 0.9.1 to 0.9.3"

setup.py

@@ -45,7 +45,7 @@ setup(
         'aerofiles==1.0.0',
         'geoalchemy2==0.6.2',
         'shapely==1.6.4.post2',
-        'ogn-client==0.9.3',
+        'ogn-client==0.9.1',
         'psycopg2-binary==2.8.1',
         'mgrs==1.3.5',
         'xmlunittest==0.5.0',