Fixed required carbon version

Author: GrahamCampbell

src/Illuminate/Support/composer.json

@@ -18,7 +18,7 @@
         "ext-mbstring": "*",
         "doctrine/inflector": "~1.1",
         "illuminate/contracts": "5.6.*",
-        "nesbot/carbon": "^1.24.1"
+        "nesbot/carbon": "1.25.*"
     },
     "conflict": {
         "tightenco/collect": "<5.5.33"