When comparing config values, use strict string comparison

src/Console/Config.php

@@ -128,7 +128,7 @@ HELP;
 				throw new RuntimeException("$cat.$key is an array and can't be set using this command.");
 			}
 
-			if ($this->config->get($cat, $key) == $value) {
+			if ($this->config->get($cat, $key) === $value) {
 				throw new RuntimeException("$cat.$key already set to $value.");
 			}