updated dependencies

Author: Oscar Otero

composer.json

@@ -19,7 +19,7 @@
     },
     "require": {
         "php": "^7.2",
-        "gettext/gettext": "dev-v5-dev"
+        "gettext/gettext": "^5.0.0"
     },
     "require-dev": {
         "phpunit/phpunit": "^8.0",