fix migrate m2m add、change and remove #288
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dictdiffer.diff
is not friendly to check the list. It can only check the difference between the elements of the same index of two lists, but theold_m2m_fields
andnew_m2m_fields
The elements of these two lists are not sorted, and it is easy to compare errors. The function in this submission can sort these two lists according to thethrough
keyword. Now you can add and delete many to many fields