Bump oas-validator from 3.3.0 to 4.0.3

Bumps [oas-validator](https://github.com/Mermade/oas-kit) from 3.3.0 to 4.0.3.
- [Release notes](https://github.com/Mermade/oas-kit/releases)
- [Changelog](https://github.com/Mermade/oas-kit/blob/master/CHANGELOG.md)
- [Commits](https://github.com/Mermade/oas-kit/compare/oas-validator@3.3.0...oas-validator@4.0.3)

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

package.json

@@ -41,7 +41,7 @@
     "node-readfiles": "^0.2.0",
     "oas-linter": "^3.0.0",
     "oas-resolver": "^2.2.4",
-    "oas-validator": "^3.0.1",
+    "oas-validator": "^4.0.3",
     "redoc": "v2.0.0-rc.12",
     "yaml": "^1.5.0"
   },