Bump to 2.0.3

Bump to 2.0.3

Fix importer cab file download to handle selfsigned certificates

This release handles cab file download for importer when performed on a selfsigned Cyberwatch instance.

Refactoring: JSON data is now parsed into objects without models

This version removes usage of models, and will parse any JSON response from the Cyberwatch API into a named tuple.
This means that any new attribute will now be automatically retrieved without any change from the library.

Warning: scripts written for version 1.X are not be compatible with this new version and have to be updated. The main change is that attributes are now named tuples when they were dictionaries in 1.X. All examples have been updated accordingly.