• Adds the Workbench layer API.
• Adds checks to ensure valid type names are provided.
• Supports parsing generic custom STIX 2 content without needing to create classes for them.
• Fixes "Not JSON serializable" error in TAXIICollectionStore.
• Fixes bug with parsing JSON files in FileSystemStore.
• Fixes bug with Filters in TAXIICollectionStore.
• Fixes minor bugs in the patterning API.
• Fixes bug with ListProperty containing DictionaryProperty.
• Fixes bug with parsing observables.
• Fixes bug involving optional properties with default values.
• Changes custom observable extensions to require properties to be defined as a list of tuples rather than a dictionary.
• Changes Filters to allow passing a dictionary as a filter value.
• Changes get_dict to a private function.
• taxii2-client is now an optional dependency.