Bump mypy from 1.3.0 to 1.4.0 (#92)

Author: dependabot[bot]

poetry.lock

@@ -27,7 +27,7 @@ python = ">=3.7"
 [tool.poetry.group.dev.dependencies]
 black = "^23.1.0"
 flake8 = { version = "^6.0.0", python = ">=3.8.1" }
-mypy = ">=1.2,<1.4"
+mypy = ">=1.2,<1.5"
 
 [tool.black]
 line-length = 79