[requires.io] dependency update

requires · requires · commit b512a7988a6a · 2020-03-10T18:19:22.000-07:00
diff --git a/tox.ini b/tox.ini
@@ -142,7 +142,7 @@ basepython = python3.8
 skip_install = True
 
 deps =
-    mypy==0.761
+    mypy==0.770
 
 commands =
     mypy                                       \
