BUG: Groupby.transform related to BinGrouper and GH8046 (GH8430)
Merge pull request #8434 from jreback/bin_grouper

BUG: Groupby.transform related to BinGrouper and GH8046 (GH8430)
DOC: mention 'category' in select_dtypes docstring
Merge pull request #8439 from bthyreau/doc_selectdtypes_categ

DOC: mention 'category' in select_dtypes docstring
BUG: NDFrame.equals gives false negatives with dtype=object (GH8437)
Merge pull request #8443 from unutbu/dtypeO-equals

BUG: NDFrame.equals gives false negatives with dtype=object (GH8437)
CI: use conda for most build dependencies
Merge pull request #7971 from cpcloud/conda

CI/WIP: Use conda for most deps