warn instead of raising an error for deprecation

12 jobs for api in 11 minutes and 12 seconds (queued for 2 seconds)
Status Job ID Name Coverage
  Build
passed #68930
conda-linux
build_linux_27

00:04:55

passed #68932
conda-linux
build_linux_35

00:04:14

passed #68934
conda-linux
build_linux_36

00:04:08

passed #68935
conda-macosx
build_macosx_27

00:02:32

passed #68933
conda-macosx
build_macosx_35

00:02:32

passed #68931
conda-macosx
build_macosx_36

00:02:12

 
  Test
passed #68940
conda-linux
test_linux_27

00:04:12

48.0%
passed #68938
conda-linux
test_linux_35

00:04:24

48.0%
passed #68936
conda-linux
test_linux_36

00:04:18

48.0%
passed #68937
conda-macosx
test_macosx_27

00:02:36

48.0%
passed #68939
conda-macosx
test_macosx_35

00:02:35

48.0%
passed #68941
conda-macosx
test_macosx_36

00:02:35

48.0%