TST: restore type checks to maybe_promote tests#28561

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jbrockmendel wants to merge 3 commits intopandas-dev:masterfrom

jbrockmendel:maybe_promote2

Commits on Sep 21, 2019

Commits on Sep 22, 2019

Update pandas/core/dtypes/cast.py

jbrockmendel
and
gfyoung
authored