Update composer.json

Author: freekmurze

composer.json

@@ -24,7 +24,7 @@
     ],
     "require": {
         "php": "^7.0",
-        "spatie/image": "~1.3.5",
+        "spatie/image": "^1.4",
         "spatie/temporary-directory": "^1.1",
         "symfony/process": "^3.0"
     },