[MRG] Replace np.in1d() with np.isin()

[ntolley]

Problem raised in #794 that numpy version 2.0.0 has deprecated np.in1d()

[dylansdaniels]

@ntolley i can squash and merge per our discussion yesterday if we're ready to go. seems like a straightforward substitution

[rythorpe]

Looks like there might be some flake8 errors, though it looks like don't have anything to do with this PR. Hmmm...

[jasmainak]

should you also bump up the minimum numpy version?

[ntolley]

@rythorpe fixed the flake8 errors!

Also @jasmainak no need, np.isin() is already a part of numpy v1.14
https://numpy.org/doc/1.14/reference/generated/numpy.isin.html#numpy.isin

[gtdang]

@ntolley Seems like all tests passed except the linux. Shall we merge this so @kmilo9999 can continue testing the CI updates?

[jasmainak]

Just one tiny comment, otherwise good to merge.

[ntolley]

Just one tiny comment, otherwise good to merge.

sounds good! everything should be addressed, whoever seeing the checks (besides ubuntu) go green feel free to merge

[jasmainak]

Thanks @ntolley !! 🥳