Allow version 2 of the contracts package.

Author: derrabus

composer.json

@@ -22,7 +22,7 @@
     "require": {
         "php": "^7.1.3",
         "psr/log": "^1.0",
-        "symfony/http-client-contracts": "^1.1.7",
+        "symfony/http-client-contracts": "^1.1.7|^2",
         "symfony/polyfill-php73": "^1.11"
     },
     "require-dev": {
@@ -32,7 +32,7 @@
         "symfony/dependency-injection": "^4.3|^5.0",
         "symfony/http-kernel": "^4.3|^5.0",
         "symfony/process": "^4.2|^5.0",
-        "symfony/service-contracts": "^1.0",
+        "symfony/service-contracts": "^1.0|^2",
         "symfony/var-dumper": "^4.3|^5.0"
     },
     "autoload": {