Merge pull request #40 from srittau/dependabot/pip/mypy-0.981

Bump mypy from 0.971 to 0.981

Author: srittau

poetry.lock

@@ -21,7 +21,7 @@ python = ">=3.7"
 
 [tool.poetry.dev-dependencies]
 asserts = ">=0.8.0, <0.12"
-mypy = "0.971"
+mypy = "0.981"
 
 [tool.black]
 line-length = 79