CLN: change requirements to only use numpy>=17
Merge pull request #7954 from cpcloud/drop-np16

CI: Drop numpy 1.6 support
BUG: related to GH5080, get_indexer choking on boolean type promotion (GH8024)
Merge pull request #8026 from jreback/series_map

BUG: related to GH5080, get_indexer choking on boolean type promotion (GH8024)
bug fix for 7987