IHF: Fixed spatie/array-to-xml version - support of php56.

Author: dmitry-ivanov

composer.json

@@ -10,14 +10,14 @@
         }
     ],
     "require": {
-        "php": ">=5.5.9",
+        "php": "^5.5.9|^7.0",
         "illuminate/support": "5.1.*|5.2.*|5.3.*|5.4.*",
         "nesbot/carbon": "^1.19",
         "symfony/filesystem": "^2.7|^3.0",
         "symfony/finder": "^2.7|^3.0",
         "symfony/process": "^2.7|^3.0",
         "symfony/var-dumper": "^2.7|^3.0",
-        "spatie/array-to-xml": "~2.3.0"
+        "spatie/array-to-xml": "^2.3|^2.5"
     },
     "require-dev": {
         "phpunit/phpunit": "^5.0",