Bumping version to 0.28

Author: dgtlmoon

backend/store.py

@@ -104,7 +104,7 @@ def __init__(self, datastore_path="/datastore", include_default_watches=True):
                 self.add_watch(url='https://changedetection.io', tag='Tech news')
 
 
-        self.__data['version_tag'] = "0.27"
+        self.__data['version_tag'] = "0.28"
 
         if not 'app_guid' in self.__data:
             self.__data['app_guid'] = str(uuid_builder.uuid4())