Fixed incorrect typehints

Author: JakubOnderka

src/ConsoleColor.php

@@ -225,8 +225,7 @@ public function getPossibleStyles()
 
     /**
      * @param string $name
-     * @return string
-     * @throws InvalidStyleException
+     * @return string[]
      */
     private function themeSequence($name)
     {
@@ -240,7 +239,6 @@ private function themeSequence($name)
     /**
      * @param string $style
      * @return string
-     * @throws InvalidStyleException
      */
     private function styleSequence($style)
     {