Improve tests for php 7.2

src/Command/BuiltIn/DeployCommand.php

@@ -143,6 +143,9 @@ class DeployCommand extends AbstractCommand
     protected function runOnHosts(OutputInterface $output, $tasks)
     {
         $hosts = $this->runtime->getEnvOption('hosts');
+        if (!is_array($hosts) && !$hosts instanceof \Countable) {
+            $hosts = [];
+        }
         if (count($hosts) == 0) {
             $output->writeln(sprintf('    No hosts defined, skipping %s tasks', $this->getStageName()));
             $output->writeln('');

src/Command/BuiltIn/Releases/ListCommand.php

@@ -74,6 +74,9 @@ class ListCommand extends AbstractCommand
             $output->writeln('');
 
             $hosts = $this->runtime->getEnvOption('hosts');
+            if (!is_array($hosts) && !$hosts instanceof \Countable) {
+                $hosts = [];
+            }
             if (count($hosts) == 0) {
                 $output->writeln('No hosts defined');
                 $output->writeln('');