Merge pull request #62 from common-workflow-language/requires-io-master

[requires.io] dependency update on master branch

Author: mr-c

tox.ini

@@ -21,7 +21,7 @@ usedevelop = True
 commands = make mypy2
 whitelist_externals = make
 deps =
-  mypy==0.560
+  mypy==0.570
   -rrequirements.txt
 
 [testenv:py35-mypy3]