ENH: Bump mypy to latest version

This includes support for Python 3.14

Author: jamesobutler

pyproject.toml

@@ -41,7 +41,7 @@ gcp = ["dataclasses>=0.8; python_version=='3.6'", "google-auth>=1.6"]
 
 [dependency-groups]
 test = [
-    "mypy==0.982",
+    "mypy==1.18.2",
     "flake8==6.1.0",
     "pytest==7.1.3",
     "pytest-cov==3.0.0",