test py37

tests/conda/py37/environment.yml

@@ -0,0 +1,2 @@
+dependencies:
+  - python=3.7

tests/conda/py37/verify

@@ -0,0 +1,4 @@
+#!/usr/bin/env python
+import sys
+
+assert sys.version_info[:2] == (3, 7), sys.version