There are two main branches of wxWidgets:
3.0.x (git branch = WX_3_0_BRANCH) - this is the "stable" release branch.
3.1.x (git branch = master) - this is the "development" release branch.
The latest release of the 3.0.x branch is 3.0.4, but wxPython pulls in
directly from the WX_3_0_BRANCH and not from 3.0.x releases. That's why
wxPython reports 3.0.5, since it is pulling from the head of the
WX_3_0_BRANCH.
You need to request the updates be backported from master to
WX_3_0_BRANCH. Note that it may not be possible to backport those changes
if they involved ABI changes.
Scott