Bump ws from 3.3.2 to 5.2.4

Bumps [ws](https://github.com/websockets/ws) from 3.3.2 to 5.2.4.
- [Release notes](https://github.com/websockets/ws/releases)
- [Commits](websockets/ws@3.3.2...5.2.4)

---
updated-dependencies:
- dependency-name: ws
  dependency-type: direct:production
...

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

package.json

@@ -49,7 +49,7 @@
     "lodash": "^4.16.4",
     "retry": "^0.12.0",
     "secure-random": "^1.1.2",
-    "ws": "^3.3.2"
+    "ws": "^5.2.4"
   },
   "devDependencies": {
     "babel-cli": "^6.16.0",

yarn.lock

@@ -3161,10 +3161,6 @@ uid-number@^0.0.6:
   version "0.0.6"
   resolved "https://registry.yarnpkg.com/uid-number/-/uid-number-0.0.6.tgz#0ea10e8035e8eb5b8e4449f06da1c730663baa81"
 
-ultron@~1.1.0:
-  version "1.1.1"
-  resolved "https://registry.yarnpkg.com/ultron/-/ultron-1.1.1.tgz#9fe1536a10a664a65266a1e3ccf85fd36302bc9c"
-
 url@^0.11.0:
   version "0.11.0"
   resolved "https://registry.yarnpkg.com/url/-/url-0.11.0.tgz#3838e97cfc60521eb73c525a8e55bfdd9e2e28f1"
@@ -3315,13 +3311,12 @@ write@^0.2.1:
   dependencies:
     mkdirp "^0.5.1"
 
-ws@^3.3.2:
-  version "3.3.2"
-  resolved "https://registry.yarnpkg.com/ws/-/ws-3.3.2.tgz#96c1d08b3fefda1d5c1e33700d3bfaa9be2d5608"
+ws@^5.2.4:
+  version "5.2.4"
+  resolved "https://registry.yarnpkg.com/ws/-/ws-5.2.4.tgz#c7bea9f1cfb5f410de50e70e82662e562113f9a7"
+  integrity sha512-fFCejsuC8f9kOSu9FYaOw8CdO68O3h5v0lg4p74o8JqWpwTf9tniOD+nOB78aWoVSS6WptVUmDrp/KPsMVBWFQ==
   dependencies:
     async-limiter "~1.0.0"
-    safe-buffer "~5.1.0"
-    ultron "~1.1.0"
 
 xtend@^4.0.0:
   version "4.0.1"