Adds support for pre-commit

Author: Grimlock257

.pre-commit-hooks.yaml

@@ -0,0 +1,6 @@
+- id: openapi-spec-validator
+  name: openapi-spec-validator
+  entry: openapi-spec-validator
+  description: Hook to validate Open API specs.
+  language: python
+  files: .*openapi.*\.(json|yaml|yml)

hooks.yaml

@@ -0,0 +1,6 @@
+- id: openapi-spec-validator
+  name: openapi-spec-validator
+  entry: openapi-spec-validator
+  description: Hook to validate Open API specs.
+  language: python
+  files: .*openapi.*\.(json|yaml|yml)

setup.py

@@ -75,6 +75,11 @@ def run_tests(self):
         "six",
         'pathlib2;python_version=="2.7"',
     ],
+    extras_require={
+        'dev': [
+            'pre-commit'
+        ]
+    },
     tests_require=[
         "mock",
         "pytest",