0.8.8

Added

• Adding serialized assembly item to get_item
• Add CostCategory record (#482)
• Introduce search only fields (#483)

Fixed

• Fix accessing custom field values returned in advanced search results (#480)
• Fixing bug where single-selection custom multi select fields would incorrectly be parsed 3377c97
• Fixed some field definitions on serialized assembly item
• Properly extract external_id from advanced search results (#478)