Update pre-commit config

Author: sondrelg

.github/workflows/testing.yml

@@ -19,7 +19,7 @@ jobs:
           restore-keys: |
             ${{ runner.os }}-pip-
             ${{ runner.os }}-
-      - run: python -m pip install pre-commit pylint
+      - run: python -m pip install pre-commit pylint tomli setuptools pip -U
       - run: pre-commit run --all-files
   test:
     # ---------------------------------------------------

.pre-commit-config.yaml

@@ -1,9 +1,9 @@
 repos:
-  - repo: https://github.com/ambv/black
-    rev: 21.5b1
+  - repo: https://github.com/psf/black
+    rev: 21.7b0
     hooks:
       - id: black
-        args: ["--quiet"]
+        args: ['--quiet']
   - repo: https://github.com/pre-commit/pre-commit-hooks
     rev: v4.0.1
     hooks:
@@ -28,23 +28,19 @@ repos:
             'flake8-pytest-style',
         ]
   - repo: https://github.com/asottile/pyupgrade
-    rev: v2.17.0
+    rev: v2.24.0
     hooks:
       - id: pyupgrade
         args: ["--py36-plus"]
-  - repo: https://github.com/asottile/seed-isort-config
-    rev: v2.2.0
-    hooks:
-      - id: seed-isort-config
   - repo: https://github.com/pycqa/isort
-    rev: 5.8.0
+    rev: 5.9.3
     hooks:
       - id: isort
   - repo: https://github.com/pre-commit/mirrors-mypy
-    rev: 'v0.812'
+    rev: 'v0.910'
     hooks:
       - id: mypy
-        additional_dependencies: [django, djangorestframework, inflection, openapi-spec-validator, prance, pyYAML, django-stubs, djangorestframework-stubs, drf_yasg, drf-spectacular]
+        additional_dependencies: [django, djangorestframework, inflection, openapi-spec-validator, prance, pyYAML, django-stubs, djangorestframework-stubs, drf_yasg, drf-spectacular, types-PyYAML]
   - repo: local
     hooks:
       - id: pylint

openapi_tester/loaders.py

@@ -231,6 +231,6 @@ def load_schema(self) -> dict:
         :return: Schema contents as a dict
         :raises: ImproperlyConfigured
         """
-        with open(self.path) as file:
+        with open(self.path, encoding="utf-8") as file:
             content = file.read()
             return json.loads(content) if ".json" in self.path else yaml.load(content, Loader=yaml.FullLoader)