Update dependencies

Author: damienmoulard

composer.json

@@ -1,5 +1,5 @@
 {
-    "name": "ekyna/payum-payzen",
+    "name": "damienmoulard/payum-payzen",
     "description": "PayZen Payum gateway",
     "type": "component",
     "authors": [
@@ -12,15 +12,15 @@
         "payum",
         "payzen"
     ],
-    "homepage": "https://github.com/ekyna/PayumPayzen",
+    "homepage": "https://github.com/damienmoulard/PayumPayzen",
     "license": [
         "MIT"
     ],
     "require": {
         "php": "^7.0",
         "payum/core": "^1.5",
-        "php-http/guzzle6-adapter": "^1.1",
-        "symfony/process": "~2.7|~3.0|~4.0",
+        "php-http/guzzle6-adapter": "^2.0",
+        "symfony/process": "4.4.*",
         "psr/log": "~1.0"
     },
     "autoload": {