Log Message:
py-soappy: updated to 0.12.22

0.12.22:
- proper usage of config property inside objects.
- dump user defined types with handler functions (can be used to override dump
  of built-in types).

0.12.21:
- Dispatching custom objects, slots supported.

0.12.20:
- better version handling
- display summary on pypi
- non disclosed intermediate release to polish pypi output