bug #6 Close PR after rebased commits (peterrehm)

Discussion
----------

In case of a rebase according to #4 github does not detect the merge automatically.

Tickets:
- none

Commits
-------

- 28945f1 Close unmerged PR (peterrehm)

src/Command/MergeCommand.php

@@ -95,6 +95,13 @@ public function execute(InputInterface $input, OutputInterface $output)
             return;
         }
 
+        $pr = $client->pullRequest()->show($input->getOption('username'), $input->getOption('repository'), $input->getArgument('pr'));
+
+        // In case of a rebase the PR might not be closed, so close automatically
+        if (false === $pr['merged']) {
+            $client->pullRequest()->update($input->getOption('username'), $input->getOption('repository'), $input->getArgument('pr'), ['state' => 'closed']);
+        }
+
         $output->writeln('The pull request has been merged successfully.');
     }
 }