- Update to 4.19.24
* Added support for Python v3.9.
* %InstanceCode is now used to provide the default result of
virtual handlers that return a class or mapped type by value.
* 'android_abi' can now be used in a configuration file when
building the sip module using qmake. This is required when
using Qt v5.14 or later on Android.
- all intermediate versions are tagged "minor bug-fix release"
- refresh disable-strip.diff

And it's time for SIP 5!