add mypy back to dev tools

diff --git a/pyproject.toml b/pyproject.toml
index 74cc8f9ce2f967df247dc6348de4bf7ed049777b..adadddcef160c9da910b2089fa81aeae478b92c1 100644 (file)
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -57,6 +57,7 @@ coverage = "^6.0"
 twine = "^3.1.1"
 wheel = "^0.35.0"
 pylint = "^2.7.4"
+mypy = "^0.931"
 
 [tool.poetry.extras]
 doh = ['httpx', 'h2', 'requests', 'requests-toolbelt']