add hasura:update command to facilitate generation from new script version

commands.json

@@ -61,6 +61,11 @@
       "description": "Generate Hasura metadata",
       "cmd": ["node", "lib/generateHasuraMetadata.js"]
     },
+    "hasura:update": {
+      "description": "Generate Hasura fresh metadata from new script",
+      "deps": ["build", "hasura:generate", "hasura:apply"],
+      "cmd": ["echo", "Hasura metadata updated"]
+    },
     "codegen": {
       "description": "Generate TypeORM entities from the schema file",
       "cmd": ["squid-typeorm-codegen"]