Future approach: Updating xmlschema #123
Description
Because of #106 I tried to update xmlschema to 4.1.0 and encountered a problem where no C code was generated anymore.
Up to version 3.4.5 cbexigen generates c code without problem.
From version 4.0 to including 4.1.0 xmlschema changed target_dict to _target_dict. This fix is handled here: #122
Starting with 4.2.0 xmlschema removed _target_dict and changed a few things. To support xmlschema>=4.2.0 we need to put some work into cbexigen.
But right now I think it is okay to support xmlschema version <=4.1.0.