Update to mypy 0.740

Author: brettcannon

.pre-commit-config.yaml

@@ -8,7 +8,7 @@ repos:
   - id: trailing-whitespace
 
 - repo: https://github.com/pre-commit/mirrors-mypy
-  rev: v0.720
+  rev: v0.740
   hooks:
   - id: mypy
     exclude: '^(docs|tasks|tests)|setup\.py'