Update composer.json dependencies

Author: sylvainraye

composer.json

@@ -25,8 +25,9 @@
   },
   "require": {
     "php": ">=7.1",
+    "psr/http-client": "^1.0",
     "psr/http-message": "^1.0",
-    "php-http/httplug": "^2.0",
+    "php-http/httplug": "^1.1 || ^2.0",
     "php-http/message": "^1.7",
     "php-http/discovery": "^1.6",
     "php-http/message-factory": "^v1.0",