Fix #19 Close #20 Implicit int conversion warning on PHP8.1 (#21)

Author: mistic100

src/RandomColor.php

@@ -157,7 +157,7 @@ static private function _pickBrightness($h, $s, $options)
           break;
 
         case 'light':
-          $range[0] = ($range[1] + $range[0]) / 2;
+          $range[0] = round(($range[1] + $range[0]) / 2);
           break;
       }
     }
@@ -228,7 +228,7 @@ static private function _getMinimumBrightness($h, $s)
       {
         $m = ($v2 - $v1) / ($s2 - $s1);
         $b = $v1 - $m * $s1;
-        return $m * $s + $b;
+        return round($m * $s + $b);
       }
     }
 
@@ -387,4 +387,4 @@ static public function hsv2rgb($hsv)
     'h' => array(283,334),
     's' => array(20,100)
     )
-  );
+  );