Version 2.2.9

New features and fixes:

• DFTable - clean-up the code
• Created unit tests for DFTable
• Implemented the possibility of styling the header in DFTable
• Implemented the possibility of styling the index on levels in DTTable
• Fixed minor bugs for index showing in DFTable

Backwards incompatible changes:

• Moved Style, ColumnStyle, RowStyle, CellStyle classes in qf_lib/documents_utils/document_exporting/element/helpers/style.py
• Moved DataType and StylingType in qf_lib/documents_utils/document_exporting/element/helpers/style_enums.py