fixed test

Author: Oscar Otero

.travis.yml

@@ -4,6 +4,7 @@ sudo: false
 php:
   - 7.2
   - 7.3
+  - 7.4
 
 before_script:
   - composer self-update

composer.json

@@ -23,7 +23,7 @@
     },
     "require-dev": {
         "phpunit/phpunit": "^8.1",
-        "zendframework/zend-diactoros": "^2.2",
+        "laminas/laminas-diactoros": "^2.2",
         "friendsofphp/php-cs-fixer": "^2.0",
         "squizlabs/php_codesniffer": "^3.0",
         "oscarotero/php-cs-fixer-config": "^1.0"