Fix branch alias and bump dependency

Author: tvdijen

composer.json

@@ -46,7 +46,7 @@
         "guzzlehttp/psr7": "~2.8",
         "psr/clock": "~1.0",
         "simplesamlphp/assert": "~2.0",
-        "simplesamlphp/composer-xmlprovider-installer": "~1.2"
+        "simplesamlphp/composer-xmlprovider-installer": "~1.3"
     },
     "require-dev": {
         "simplesamlphp/simplesamlphp-test-framework": "~1.11"
@@ -57,7 +57,7 @@
     },
     "extra": {
         "branch-alias": {
-            "dev-master": "v2.8.x-dev"
+            "dev-master": "v2.7.x-dev"
         }
     },
     "config": {