Add missing type annotations

Author: sebastianbergmann

src/Chunk.php

@@ -33,7 +33,7 @@ final class Chunk
     private $endRange;
 
     /**
-     * @var array
+     * @var Line[]
      */
     private $lines;
 
@@ -66,11 +66,17 @@ public function getEndRange(): int
         return $this->endRange;
     }
 
+    /**
+     * @return Line[]
+     */
     public function getLines(): array
     {
         return $this->lines;
     }
 
+    /**
+     * @param Line[] $lines
+     */
     public function setLines(array $lines): void
     {
         $this->lines = $lines;