build(deps): update cebe/php-openapi requirement from ^1.6 to ^1.7 (#104)

Updates the requirements on [cebe/php-openapi](https://github.com/cebe/php-openapi) to permit the latest version.
- [Release notes](https://github.com/cebe/php-openapi/releases)
- [Commits](cebe/php-openapi@1.6.0...1.7.0)

---
updated-dependencies:
- dependency-name: cebe/php-openapi
  dependency-type: direct:production
...

Signed-off-by: dependabot[bot] <[email protected]>

Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

Author: dependabot[bot]

composer.json

@@ -12,7 +12,7 @@
     "require": {
         "php": ">=7.4",
         "ext-json": "*",
-        "cebe/php-openapi": "^1.6",
+        "cebe/php-openapi": "^1.7",
         "fakerphp/faker": "^1.19",
         "league/openapi-psr7-validator": "^0.18",
         "thecodingmachine/safe": "^1.3"