Log Message:
py-stone: update to 3.3.8.

3.3.8

Bug fix for enumerated subtypes custom annotation by @vidit2606 in #338
Update stone version to 3.3.8 by @vidit2606 in #339

3.3.7

If a parameter has no properties still rerturn an empty dict not nil by @shizam \ 
in #333
fix: Replace deprecated distutils by @Moraxyc in #334
Fix custom annotation inheirtance bug by @rhui-dbx in #336
Update version to 3.3.7 by @vidit2606 in #337