Fix docs generation, PSR-12 type compliance (#790)

* Correct docs generation, fixes #774

* Standardise on unaliased int and bool types, as per PSR-12 section 2.5

src/FFMpeg/Format/Video/X264.php

@@ -16,10 +16,10 @@ namespace FFMpeg\Format\Video;
  */
 class X264 extends DefaultVideo
 {
-    /** @var boolean */
+    /** @var bool */
     private $bframesSupport = true;
 
-    /** @var integer */
+    /** @var int */
     private $passes = 2;
 
     public function __construct($audioCodec = 'libfaac', $videoCodec = 'libx264')