v1.2.0

Added new default filters to the SDK.
Fixed missing imports for portable case exports.
Added new kwargs to Client constructor for specifying custom cipher configurations.
Re-defined evidence iteration functions to improve performance.
Removed 3.9 requirement from prerequisites.
Updated to work with Python 3.12.
Added Agent construction method to Case class.
Updated all documentation references from AccessData to Exterro.
Updated example code snippets where applicable.