DeployRunner: Fix task variable being overridden by other var type

$task is of type ConfigurableTaskInterface, while $deployerTask is of type Task (from Deployer). Next taskConfig iteration would run `supports` on Deployer Task type, which obviously does not exist.

Author: tdgroot

src/DeployRunner.php

@@ -148,10 +148,10 @@ private function initializeConfigurableTask(ConfigurableTaskInterface $task, Con
 
         foreach ($configurations as $taskConfig) {
             if ($task->supports($taskConfig)) {
-                $task = $task->configureWithTaskConfig($taskConfig);
+                $deployerTask = $task->configureWithTaskConfig($taskConfig);
 
-                if ($task && $taskConfig instanceof StageConfigurableInterface) {
-                    $this->configureTaskOnStage($task, $taskConfig);
+                if ($deployerTask && $taskConfig instanceof StageConfigurableInterface) {
+                    $this->configureTaskOnStage($deployerTask, $taskConfig);
                 }
             }
         }