Upgrade framework

vendor/sebastian/resource-operations/composer.json

@@ -9,17 +9,28 @@
             "email": "sebastian@phpunit.de"
         }
     ],
+    "prefer-stable": true,
     "require": {
-        "php": ">=5.6.0"
+        "php": ">=7.3"
+    },
+    "require-dev": {
+        "phpunit/phpunit": "^9.0"
     },
     "autoload": {
         "classmap": [
             "src/"
         ]
     },
+    "config": {
+        "platform": {
+            "php": "7.3.0"
+        },
+        "optimize-autoloader": true,
+        "sort-packages": true
+    },
     "extra": {
         "branch-alias": {
-            "dev-master": "1.0.x-dev"
+            "dev-master": "3.0-dev"
         }
     }
 }