Bump ws from 6.2.1 to 7.4.6

Bumps [ws](https://github.com/websockets/ws) from 6.2.1 to 7.4.6.
- [Release notes](https://github.com/websockets/ws/releases)
- [Commits](websockets/ws@6.2.1...7.4.6)

Signed-off-by: dependabot[bot] <support@github.com>

Author: dependabot[bot]

package.json

@@ -63,7 +63,7 @@
     "uuid": "^3.4.0",
     "winston": "^3.3.3",
     "winston-daily-rotate-file": "^4.4.2",
-    "ws": "^6.1.2"
+    "ws": "^7.4.6"
   },
   "devDependencies": {
     "chai": "^4.2.0",

yarn.lock

@@ -546,11 +546,6 @@ astral-regex@^1.0.0:
   resolved "https://registry.yarnpkg.com/astral-regex/-/astral-regex-1.0.0.tgz#6c8c3fb827dd43ee3918f27b82782ab7658a6fd9"
   integrity sha512-+Ryf6g3BKoRc7jfp7ad8tM4TtMiaWvbF/1/sQcZPkkS7ag3D5nMBCe2UfOTONtAkaG0tO0ij3C5Lwmf1EiyjHg==
 
-async-limiter@~1.0.0:
-  version "1.0.1"
-  resolved "https://registry.yarnpkg.com/async-limiter/-/async-limiter-1.0.1.tgz#dd379e94f0db8310b08291f9d64c3209766617fd"
-  integrity sha512-csOlWGAcRFJaI6m+F2WKdnMKr4HhdhFVBk0H/QbJFMCr+uO2kwohwXQPxw/9OCxp05r5ghVBFSyioixx3gfkNQ==
-
 async-listener@^0.6.0:
   version "0.6.10"
   resolved "https://registry.yarnpkg.com/async-listener/-/async-listener-0.6.10.tgz#a7c97abe570ba602d782273c0de60a51e3e17cbc"
@@ -4824,12 +4819,10 @@ write@^0.2.1:
   dependencies:
     mkdirp "^0.5.1"
 
-ws@^6.1.2:
-  version "6.2.1"
-  resolved "https://registry.yarnpkg.com/ws/-/ws-6.2.1.tgz#442fdf0a47ed64f59b6a5d8ff130f4748ed524fb"
-  integrity sha512-GIyAXC2cB7LjvpgMt9EKS2ldqr0MTrORaleiOno6TweZ6r3TKtoFQWay/2PceJ3RuBasOHzXNn5Lrw1X0bEjqA==
-  dependencies:
-    async-limiter "~1.0.0"
+ws@^7.4.6:
+  version "7.4.6"
+  resolved "https://registry.yarnpkg.com/ws/-/ws-7.4.6.tgz#5654ca8ecdeee47c33a9a4bf6d28e2be2980377c"
+  integrity sha512-YmhHDO4MzaDLB+M9ym/mDA5z0naX8j7SIlT8f8z+I0VtzsRbekxEutHSme7NPS2qE8StCYQNUnfWdXta/Yu85A==
 
 xtend@^4.0.1:
   version "4.0.2"