Update README.md

Kostersson · web-flow · commit a6b777c34a60 · 2020-04-21T16:39:59.000+03:00
diff --git a/README.md b/README.md
@@ -13,7 +13,7 @@ add following to composer
 ```json
     "require" : 
     {
-        "solinor/paymenthighwayio" : "1.8.0"
+        "solinor/paymenthighwayio" : "2.0.0"
     }
 ```
 
