bump relayer version for gas fee change (#97)

Author: wanwiset25

subnet/deployment-generator/script/gen_config.js

@@ -20,7 +20,7 @@ var config = {
     subnet:   (process.env.VERSION_SUBNET   || 'v0.1.6'),
     bootnode: (process.env.VERSION_BOOTNODE || 'v0.1.6'),
     observer: (process.env.VERSION_OBSERVER || 'latest'),
-    relayer:  (process.env.VERSION_RELAYER  || 'v0.1.4'),
+    relayer:  (process.env.VERSION_RELAYER  || 'v0.1.5'),
     stats:    (process.env.VERSION_STATS    || 'v0.1.7'),
     frontend: (process.env.VERSION_FRONTEND || 'v0.1.7')
   },