Upgrade PHPUnit to 8.5 (php 7.2) and 9.3 (php >= 7.3).

Author: derrabus

composer.json

@@ -23,7 +23,7 @@
     "require": {
         "php": ">=7.1.3",
         "psr/log": "^1.0",
-        "symfony/http-client-contracts": "^1.1.8|^2",
+        "symfony/http-client-contracts": "^1.1.10|^2",
         "symfony/polyfill-php73": "^1.11",
         "symfony/service-contracts": "^1.0|^2"
     },