v2.0.0

Changed

• Test changed from unittest to pytest, more tests for greater coverage.
• Minimal Python version raised to 3.11
• Improved documentation
• Parameter any_ in firebird.lib.schema.FunctionArgument.is_by_descriptor was replaced
  by any_desc keyword-only argument.
• Parameter without_optional in firebrid.lib.logmsg.MsgDesc was changed to keyword-only.
• firebird.lib.schema.CharacterSet.default_colate was renamed to default_colation.

Added

• Added firebird.lib.schema.Privilege.is_usage method.