Add guzzlehttp/guzzle as composer requirement

composer.json

@@ -31,6 +31,7 @@
 		"divineomega/password_exposed": "^2.8",
 		"ezyang/htmlpurifier": "^4.7",
 		"friendica/json-ld": "^1.0",
+		"guzzlehttp/guzzle": "^6.5",
 		"league/html-to-markdown": "^4.8",
 		"level-2/dice": "^4",
 		"lightopenid/lightopenid": "dev-master",

composer.lock

@@ -4,7 +4,7 @@
         "Read more about it at https://getcomposer.org/doc/01-basic-usage.md#installing-dependencies",
         "This file is @generated automatically"
     ],
-    "content-hash": "fd22bd8c29dcea3d6b6eeb117d79af52",
+    "content-hash": "aa279ba22954af464cd7b4a5e2d74eec",
     "packages": [
         {
             "name": "asika/simple-console",