Fix FTBFS due to changes in sklearn 0.24.0
Ref.: https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=1014618
There's an upstream PR that fixes the current testsuite assertion:
https://github.com/EpistasisLab/tpot/pull/1215
I've had to adjust the patch a little to make it apply cleanly, but I can confirm that the build is now passing.
Cc @ckk