Package throws an exception when using with Statamic (#155)

Statamic overrides the View instance, which isn't registered yet if you call the ConfigurationValidator in the packageRegistered function.

src/FeedServiceProvider.php

@@ -27,7 +27,10 @@ public function configurePackage(Package $package): void
     public function packageRegistered()
     {
         $this->registerRouteMacro();
-
+    }
+
+    public function packageBooted()
+    {
         if (! app()->runningUnitTests()) {
             ConfigurationValidator::validate();
         }