Only install on 3.7 because pypy is 3.6 and uses typed-ast

thomasrockhu · thomasrockhu · commit 098c82bf13bc · 2020-05-22T13:03:52.000-04:00
diff --git a/tests/requirements.txt b/tests/requirements.txt
@@ -5,4 +5,4 @@ pytest>=3.6.0
 pytest-cov
 funcsigs
 requests
-black ; python_version >= '3.6'
+black ; python_version >= '3.7'
