Add integration test to cover json output

Verified only if the output contain a common json simbols: list of
objects: [{

Signed-off-by: Vitor Mattos <vitor@php.rio>

lib/Command/Command/Add.php

@@ -40,6 +40,7 @@ class Add extends Base {
 	}
 
 	protected function configure(): void {
+		parent::configure();
 		$this
 			->setName('talk:command:add')
 			->setDescription('Add a new command')

lib/Command/Command/Update.php

@@ -41,6 +41,7 @@ class Update extends Base {
 	}
 
 	protected function configure(): void {
+		parent::configure();
 		$this
 			->setName('talk:command:update')
 			->setDescription('Add a new command')

tests/integration/features/command/command-list.feature

@@ -0,0 +1,11 @@
+Feature: command/command-list
+
+  Scenario: List all available commands as plain text
+    Given invoking occ with "talk:command:list"
+    Then the command was successful
+    And the command output contains the text "Response values: 0 - No one"
+
+  Scenario: List all available commands as json
+    Given invoking occ with "talk:command:list --output=json"
+    Then the command was successful
+    And the command output contains the text "[{"