Build(deps): Bump ws in /Predictor/PredictorWebService

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

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

Predictor/PredictorWebService/package-lock.json

@@ -279,11 +279,6 @@
       "resolved": "https://registry.npmjs.org/async-each/-/async-each-1.0.3.tgz",
       "integrity": "sha512-z/WhQ5FPySLdvREByI2vZiTWwCnF0moMJ1hK9YQwDTHKh6I7/uSckMetoRGb5UBZPC1z0jlw+n/XCgjeH7y1AQ=="
     },
-    "async-limiter": {
-      "version": "1.0.0",
-      "resolved": "https://registry.npmjs.org/async-limiter/-/async-limiter-1.0.0.tgz",
-      "integrity": "sha512-jp/uFnooOiO+L211eZOoSyzpOITMXx1rBITauYykG3BRYPu8h0UcxsPNB04RR5vo4Tyz3+ay17tR6JVf9qzYWg=="
-    },
     "atob": {
       "version": "2.1.2",
       "resolved": "https://registry.npmjs.org/atob/-/atob-2.1.2.tgz",
@@ -3412,12 +3407,9 @@
       }
     },
     "ws": {
-      "version": "6.2.1",
-      "resolved": "https://registry.npmjs.org/ws/-/ws-6.2.1.tgz",
-      "integrity": "sha512-GIyAXC2cB7LjvpgMt9EKS2ldqr0MTrORaleiOno6TweZ6r3TKtoFQWay/2PceJ3RuBasOHzXNn5Lrw1X0bEjqA==",
-      "requires": {
-        "async-limiter": "~1.0.0"
-      }
+      "version": "7.4.6",
+      "resolved": "https://registry.npmjs.org/ws/-/ws-7.4.6.tgz",
+      "integrity": "sha512-YmhHDO4MzaDLB+M9ym/mDA5z0naX8j7SIlT8f8z+I0VtzsRbekxEutHSme7NPS2qE8StCYQNUnfWdXta/Yu85A=="
     },
     "xdg-basedir": {
       "version": "3.0.0",

Predictor/PredictorWebService/package.json

@@ -12,7 +12,7 @@
     "mongoose": "^5.7.7",
     "nodemon": "^1.18.10",
     "query-string-parser": "^0.2.3",
-    "ws": "^6.2.1"
+    "ws": "^7.4.6"
   },
   "devDependencies": {
     "@types/node": "^11.13.0",