Merge branch 'ligo.skymap-0.2.1' into 'testing'

ligo.skymap 0.2.1

See merge request computing/conda!115

packages/ligo.skymap.yaml

 package:
   name: ligo.skymap
-  version: 0.2.0
+  version: 0.2.1
   build_string: py36ha3f1c62_0  # [linux and py==36]
   build_string: py37hc8e8612_0  # [linux and py==37]
   build_string: py38h28235f5_0  # [linux and py==38]