update mypy package name

Author: mr-c

cwlupgrader/main.py

@@ -2,7 +2,7 @@
 
 from __future__ import print_function
 import ruamel.yaml
-from typing import Any, Dict, Union
+from typing import Any, Dict, List, Union
 from collections import Mapping, MutableMapping, Sequence
 import sys
 import copy

tox.ini

@@ -15,7 +15,7 @@ deps = -rrequirements.txt
 commands = make mypy
 whitelist_externals = make
 deps =
-  mypy-lang>=0.4
+  mypy>=0.4
   typed-ast
   -rrequirements.txt