Add php 8.1 build

Author: acrobat

.github/workflows/test-application.yaml

@@ -36,6 +36,9 @@ jobs:
                     - php-version: "8.0"
                       symfony-require: "6.0.*"
 
+                    - php-version: "8.1"
+                      symfony-require: "6.0.*"
+
         steps:
             - name: "Checkout project"
               uses: "actions/checkout@v2"

src/PagedRouteCollection.php

@@ -118,10 +118,8 @@ public function rewind(): void
 
     /**
      * Gets the number of Routes in this collection.
-     *
-     * @return int The number of routes
      */
-    public function count()
+    public function count(): int
     {
         return $this->provider->getRoutesCount();
     }