build(deps): bump swagger-spec-validator from 2.5.0 to 2.6.0 (#28)

Bumps [swagger-spec-validator](https://github.com/Yelp/swagger_spec_validator) from 2.5.0 to 2.6.0.
- [Release notes](https://github.com/Yelp/swagger_spec_validator/releases)
- [Changelog](https://github.com/Yelp/swagger_spec_validator/blob/master/CHANGELOG.rst)
- [Commits](https://github.com/Yelp/swagger_spec_validator/commits)

Signed-off-by: dependabot-preview[bot] <support@dependabot.com>

Co-authored-by: dependabot-preview[bot] <27856297+dependabot-preview[bot]@users.noreply.github.com>

Pipfile.lock

@@ -794,11 +794,10 @@
         },
         "swagger-spec-validator": {
             "hashes": [
-                "sha256:61f2d2a732b886cf33c2c24886565be9692e5814cacc17fd973e095b72b33e4f",
-                "sha256:8eb82682871f8d63067b455e2e055c8dd953ca260e791635b58dfe0b73ba1f43"
+                "sha256:ba4e636d89bf547a6f41a6945bb503cf06dde13664ad978a7407aaed772ae75f"
             ],
             "index": "pypi",
-            "version": "==2.5.0"
+            "version": "==2.6.0"
         },
         "uritemplate": {
             "hashes": [