PYTHON-1633 - Test Python 3.7 on Windows

Author: behackett

.evergreen/config.yml

@@ -1124,6 +1124,10 @@ axes:
  display_name: "Python 3.6"
  variables:
  PYTHON_BINARY: "/cygdrive/c/python/Python36/python.exe"
+ - id: "3.7"
+ display_name: "Python 3.7"
+ variables:
+ PYTHON_BINARY: "/cygdrive/c/python/Python37/python.exe"
  - id: coverage
  display_name: "Coverage"
  values: