Merge pull request #2 from pixiv/fix/frequent-restart-required

Fix frequent bot restart required

Author: Kazuhito Osabe

package.json

@@ -29,7 +29,7 @@
     "@types/uuid": "^2.0.29",
     "aws-sdk": "^2.54.0",
     "azure-storage": "^2.1.0",
-    "botkit": "0.0.15",
+    "botkit": "0.6.13",
     "chai": "^3.5.0",
     "datauri": "^1.0.5",
     "dotenv": "^4.0.0",