Fix srt timestamp

Author: mantas-done

src/Code/Converters/SrtConverter.php

@@ -130,6 +130,7 @@ public static function internalTimeToSrt($internal_time)
             $negative = true;
             $internal_time = abs($internal_time);
         }
+        $internal_time = round($internal_time, 3);
 
         $hours = floor($internal_time / 3600);
         $minutes = floor(((int)$internal_time % 3600) / 60);

tests/formats/SrtTest.php

@@ -293,6 +293,7 @@ public function testConvertToSrtTime()
         $this->assertEquals('00:00:00,001', SrtConverter::internalTimeToSrt(0.001));
         $this->assertEquals('00:00:00,010', SrtConverter::internalTimeToSrt(0.01));
         $this->assertEquals('00:00:00,100', SrtConverter::internalTimeToSrt(0.1));
+        $this->assertEquals('00:00:01,000', SrtConverter::internalTimeToSrt(0.9999));
         $this->assertEquals('99:59:59,000', SrtConverter::internalTimeToSrt(359999));
         $this->assertEquals('100:00:00,000', SrtConverter::internalTimeToSrt(360000));
     }