Another mypy fix

Author: Peter Amstutz

cwltool/job.py

@@ -143,7 +143,7 @@ def __init__(self):  # type: () -> None
         self.stagedir = None  # type: Text
         self.inplace_update = None  # type: bool
 
-    def _setup(self, kwargs):  # type: () -> None
+    def _setup(self, kwargs):  # type: (Dict) -> None
         if not os.path.exists(self.outdir):
             os.makedirs(self.outdir)