CS fixes & upgrading cs fixer config

src/Monolog/Handler/NewRelicHandler.php

@@ -41,16 +41,16 @@ class NewRelicHandler extends AbstractProcessingHandler
      * Some context and extra data is passed into the handler as arrays of values. Do we send them as is
      * (useful if we are using the API), or explode them for display on the NewRelic RPM website?
      *
-     * @var boolean
+     * @var bool
      */
     protected $explodeArrays;
 
     /**
      * {@inheritDoc}
      *
-     * @param string  $appName
-     * @param boolean $explodeArrays
-     * @param string  $transactionName
+     * @param string $appName
+     * @param bool   $explodeArrays
+     * @param string $transactionName
      */
     public function __construct(
         $level = Logger::ERROR,