Bump minimum engine/wsdl to versions with PSL swap

Ensures --prefer-lowest does not pull in azjezz/psl alongside
php-standard-library/php-standard-library.

Author: veewee

composer.json

@@ -16,8 +16,8 @@
         "php": "~8.3.0 || ~8.4.0 || ~8.5.0",
         "ext-dom": "*",
         "goetas-webservices/xsd-reader": "^0.4.11",
-        "php-soap/engine": "^2.16",
-        "php-soap/wsdl": "^1.14",
+        "php-soap/engine": "^2.19",
+        "php-soap/wsdl": "^1.18",
         "php-soap/xml": "^1.9.0",
         "veewee/xml": "^3.0",
         "php-standard-library/php-standard-library": "^3.0 || ^4.0 || ^5.0 || ^6.0",