MNT: update the base python to py37

tacaswell · tacaswell · commit b606f103f013 · 2020-07-12T19:14:48.000-04:00
This should not matter?
diff --git a/.travis.yml b/.travis.yml
@@ -22,7 +22,7 @@ env:
 
 language: python
 # Default Python version is usually 2.7
-python: 3.5
+python: 3.7
 dist: bionic
 services: docker
 
