Update demography tests to stdpopsim 0.2 #2240
Description
We have temporarily pinned stdpopsim to version 0.1.2 until we can fix the tests in test_demography.py so they are compatible with the latest stdpopsim release.
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We have temporarily pinned stdpopsim to version 0.1.2 until we can fix the tests in test_demography.py so they are compatible with the latest stdpopsim release.