Apply scrutinizer recommendations, fix return type

Author: redthor

src/AntiMattr/MongoDB/Migrations/Configuration/Configuration.php

@@ -301,12 +301,12 @@ public function getMigratedVersions()
      *
      * @param string $version
      *
-     * @return string
+     * @return int
      *
      * @throws AntiMattr\MongoDB\Migrations\Exception\UnknownVersionException Throws exception if migration version does not exist
      * @throws DomainException                                                If more than one version exists
      */
-    public function getMigratedTimestamp($version)
+    public function getMigratedTimestamp($version): int
     {
         $this->createMigrationCollection();
 
@@ -329,7 +329,7 @@ public function getMigratedTimestamp($version)
         // Convert to normalised timestamp
         $ts = new Timestamp($returnVersion['t']);
 
-        return (string) $ts;
+        return $ts->getTimestamp();
     }
 
     /**
@@ -517,7 +517,7 @@ public function getCurrentVersion()
         $this->createMigrationCollection();
 
         $migratedVersions = [];
-        if ($this->migrations) {
+        if (!empty($this->migrations)) {
             foreach ($this->migrations as $migration) {
                 $migratedVersions[] = $migration->getVersion();
             }

src/AntiMattr/MongoDB/Migrations/Tools/Console/Command/AbstractCommand.php

@@ -66,7 +66,7 @@ public function setMigrationConfiguration(Configuration $config)
     }
 
     /**
-     * @param \Symfony\Component\Console\Output\InputInterface  $input
+     * @param \Symfony\Component\Console\Input\InputInterface   $input
      * @param \Symfony\Component\Console\Output\OutputInterface $output
      *
      * @return \AntiMattr\MongoDB\Migrations\Configuration\Configuration

src/AntiMattr/MongoDB/Migrations/Tools/Console/Command/StatusCommand.php

@@ -146,7 +146,7 @@ public function execute(InputInterface $input, OutputInterface $output)
             }
 
             $executedUnavailableMigrations = $configuration->getUnavailableMigratedVersions();
-            if ($executedUnavailableMigrations) {
+            if (!empty($executedUnavailableMigrations)) {
                 $output->writeln("\n <info>==</info> Previously Executed Unavailable Migration Versions\n");
                 foreach ($executedUnavailableMigrations as $executedUnavailableMigration) {
                     $output->writeln(