Kanboard requires at least PHP 5.6 now

vendor/symfony/console/Descriptor/Descriptor.php

@@ -29,7 +29,7 @@ abstract class Descriptor implements DescriptorInterface
     /**
      * @var OutputInterface
      */
-    private $output;
+    protected $output;
 
     /**
      * {@inheritdoc}
@@ -73,9 +73,6 @@ abstract class Descriptor implements DescriptorInterface
     /**
      * Describes an InputArgument instance.
      *
-     * @param InputArgument $argument
-     * @param array         $options
-     *
      * @return string|mixed
      */
     abstract protected function describeInputArgument(InputArgument $argument, array $options = array());
@@ -83,9 +80,6 @@ abstract class Descriptor implements DescriptorInterface
     /**
      * Describes an InputOption instance.
      *
-     * @param InputOption $option
-     * @param array       $options
-     *
      * @return string|mixed
      */
     abstract protected function describeInputOption(InputOption $option, array $options = array());
@@ -93,9 +87,6 @@ abstract class Descriptor implements DescriptorInterface
     /**
      * Describes an InputDefinition instance.
      *
-     * @param InputDefinition $definition
-     * @param array           $options
-     *
      * @return string|mixed
      */
     abstract protected function describeInputDefinition(InputDefinition $definition, array $options = array());
@@ -103,9 +94,6 @@ abstract class Descriptor implements DescriptorInterface
     /**
      * Describes a Command instance.
      *
-     * @param Command $command
-     * @param array   $options
-     *
      * @return string|mixed
      */
     abstract protected function describeCommand(Command $command, array $options = array());
@@ -113,9 +101,6 @@ abstract class Descriptor implements DescriptorInterface
     /**
      * Describes an Application instance.
      *
-     * @param Application $application
-     * @param array       $options
-     *
      * @return string|mixed
      */
     abstract protected function describeApplication(Application $application, array $options = array());