Bump version to v1.7.3

Author: damiani

jigsaw

@@ -22,7 +22,7 @@ $app->bootstrapWith([
     TightenCo\Jigsaw\Bootstrap\HandleExceptions::class,
 ]);
 
-$application = new Symfony\Component\Console\Application('Jigsaw', '1.7.2');
+$application = new Symfony\Component\Console\Application('Jigsaw', '1.7.3');
 $application->add($app[TightenCo\Jigsaw\Console\InitCommand::class]);
 $application->add(new TightenCo\Jigsaw\Console\BuildCommand($app));
 $application->add(new TightenCo\Jigsaw\Console\ServeCommand($app));