Enhance stuffs

Author: peter279k

.travis.yml

@@ -2,6 +2,7 @@ language: php
 php:
 - 7.1
 - 7.2
+- 7.3
 
 before_script:
 - composer install

src/TypedArray.php

@@ -85,10 +85,7 @@ public function __construct(string $type, array $array = [])
         if (class_exists($type)) {
             //I like lambda functions ;)
             $this->allowedTypes[$type] = function ($a) use ($type) {
-                if ($a instanceof $type) {
-                    return true;
-                }
-                return false;
+                return $a instanceof $type;
             };
         }