EQPS-477: Make zend-stdlib a required dependency

Author: roribio

composer.json

@@ -9,14 +9,14 @@
     "bin": ["bin/svc"],
     "require": {
         "php": "~7.1.3||~7.2.0||~7.3.0",
-        "tomzx/php-semver-checker": "^0.13.0",
-        "symfony/console": "~4.4.0",
         "phpstan/phpdoc-parser": "^0.3.5",
-        "wikimedia/less.php": "~1.8.0"
+        "symfony/console": "~4.4.0",
+        "tomzx/php-semver-checker": "^0.13.0",
+        "wikimedia/less.php": "~1.8.0",
+        "zendframework/zend-stdlib": "^3.2.1"
     },
     "require-dev": {
         "phpunit/phpunit": "^6.5.0",
-        "zendframework/zend-stdlib": "^3.2.1",
         "squizlabs/php_codesniffer": "^3.5"
     },
     "autoload": {