feat(arby): upgrade mainnet to v1.1.8 (#687)

Author: Karl Ranna

images/utils/launcher/config/template.py

@@ -451,7 +451,7 @@ def __eq__(self, other):
         },
         "arby": {
             "name": "arby",
-            "image": "exchangeunion/arby:1.1.5",
+            "image": "exchangeunion/arby:1.1.8",
             "volumes": [
                 {
                     "host": "$data_dir/arby",