FIX: autodiscovery. Thanks @ReckeDJ

Author: pixelpeter

composer.json

@@ -39,5 +39,12 @@
     "mockery/mockery": "^1.0.0",
     "satooshi/php-coveralls": "^1.0",
     "laravel/laravel": "5.7.*"
-  }
+  },
+  "extra": {
+    "laravel": {
+      "providers": [
+        "Pixelpeter\\IsoCodesValidation\\IsoCodesValidationServiceProvider"
+      ]
+    }
+  } 
 }