[requires.io] dependency update

requires · requires · commit ac896805ccc1 · 2020-08-26T07:29:06.000-07:00
diff --git a/tox.ini b/tox.ini
@@ -89,7 +89,7 @@ basepython = {[default]basepython}
 skip_install = True
 
 deps =
-    black==19.10b0
+    black==20.8b0
 
 setenv =
     BLACK_LINT_ARGS=--check
