Update dependency @types/ws to v6.0.4 (#273)

Author: renovate[bot]

package.json

@@ -196,7 +196,7 @@
     "@types/type-is": "1.6.3",
     "@types/uuid": "3.4.6",
     "@types/whatwg-url": "6.4.0",
-    "@types/ws": "6.0.3",
+    "@types/ws": "6.0.4",
     "dot-json": "^1.1.0",
     "husky": "^3.0.9",
     "json-schema-to-typescript": "^7.1.0",

yarn.lock

@@ -1090,10 +1090,10 @@
   dependencies:
     "@types/node" "*"
 
-"@types/ws@6.0.3":
-  version "6.0.3"
-  resolved "https://registry.npmjs.org/@types/ws/-/ws-6.0.3.tgz#b772375ba59d79066561c8d87500144d674ba6b3"
-  integrity sha512-yBTM0P05Tx9iXGq00BbJPo37ox68R5vaGTXivs6RGh/BQ6QP5zqZDGWdAO6JbRE/iR1l80xeGAwCQS2nMV9S/w==
+"@types/ws@6.0.4":
+  version "6.0.4"
+  resolved "https://registry.npmjs.org/@types/ws/-/ws-6.0.4.tgz#7797707c8acce8f76d8c34b370d4645b70421ff1"
+  integrity sha512-PpPrX7SZW9re6+Ha8ojZG4Se8AZXgf0GK6zmfqEuCsY49LFDNXO3SByp44X3dFEqtB73lkCDAdUazhAjVPiNwg==
   dependencies:
     "@types/node" "*"