fix(deps): update dependency bluebird to v3.7.2 (#162)

Author: renovate[bot]

package-lock.json

@@ -23,7 +23,7 @@
     "@koa/cors": "3.0.0",
     "apollo-server-koa": "1.4.0",
     "argon2-ffi": "1.1.2",
-    "bluebird": "3.5.5",
+    "bluebird": "3.7.2",
     "dataloader": "1.4.0",
     "db-migrate": "0.11.6",
     "db-migrate-mysql": "1.1.10",