Enable mypy pre-commit hook

Change-Id: I740bc58ae57e22c878b52215e72aaec6ebca1299

.pre-commit-config.yaml

@@ -29,6 +29,12 @@ repos:
     hooks:
       - id: remove-tabs
         exclude: '.*\.(svg)$'
+  - repo: https://github.com/pre-commit/mirrors-mypy
+    rev: v1.14.1
+    hooks:
+      - id: mypy
+        args: [--config-file=./mypy.ini]
+        pass_filenames: false
   - repo: local
     hooks:
       - id: flake8

mypy.ini

@@ -11,3 +11,5 @@ disable_error_code = import-untyped,var-annotated,import-not-found
 
 # honor excludes by not following there through imports
 follow_imports = silent
+
+files = neutron_lib

tox.ini

@@ -23,7 +23,7 @@ commands =
 [testenv:mypy]
 deps = {[testenv:pep8]deps}
 commands =
-  mypy --config-file ./mypy.ini neutron_lib
+  mypy --config-file ./mypy.ini
 
 [testenv:pep8]
 deps =