Bump ws from 5.2.2 to 7.4.6 (#244)

Bumps [ws](https://github.com/websockets/ws) from 5.2.2 to 7.4.6.
- [Release notes](https://github.com/websockets/ws/releases)
- [Commits](websockets/ws@5.2.2...7.4.6)

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package.json

@@ -49,7 +49,7 @@
 		"swagger-ui-express": "^4.0.5",
 		"utf8-bytes": "0.0.1",
 		"winston": "^2.2.0",
-		"ws": "^5.1.1",
+		"ws": "^7.4.6",
 		"yn": "^4.0.0"
 	},
 	"license": "Apache-2.0",