Update adriansuter/php-autoload-override requirement from ^1.2 to ^1.3

Updates the requirements on [adriansuter/php-autoload-override](https://github.com/adriansuter/php-autoload-override) to permit the latest version.
- [Release notes](https://github.com/adriansuter/php-autoload-override/releases)
- [Commits](adriansuter/php-autoload-override@1.2...1.3)

---
updated-dependencies:
- dependency-name: adriansuter/php-autoload-override
  dependency-type: direct:development
...

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

composer.json

@@ -37,7 +37,7 @@
     "psr/http-message": "^1.0"
   },
   "require-dev": {
-    "adriansuter/php-autoload-override": "^1.2",
+    "adriansuter/php-autoload-override": "^1.3",
     "laminas/laminas-diactoros": "^2.8",
     "nyholm/psr7": "^1.5",
     "php-http/psr7-integration-tests": "dev-master",