chore: bump ws dependency

Diff: https://github.com/websockets/ws/compare/6.1.0...7.2.1

package-lock.json

@@ -1445,11 +1445,6 @@
       "integrity": "sha512-z/WhQ5FPySLdvREByI2vZiTWwCnF0moMJ1hK9YQwDTHKh6I7/uSckMetoRGb5UBZPC1z0jlw+n/XCgjeH7y1AQ==",
       "dev": true
     },
-    "async-limiter": {
-      "version": "1.0.1",
-      "resolved": "https://registry.npmjs.org/async-limiter/-/async-limiter-1.0.1.tgz",
-      "integrity": "sha512-csOlWGAcRFJaI6m+F2WKdnMKr4HhdhFVBk0H/QbJFMCr+uO2kwohwXQPxw/9OCxp05r5ghVBFSyioixx3gfkNQ=="
-    },
     "asynckit": {
       "version": "0.4.0",
       "resolved": "https://registry.npmjs.org/asynckit/-/asynckit-0.4.0.tgz",
@@ -3031,6 +3026,16 @@
       "integrity": "sha1-tf1UIgqivFq1eqtxQMlAdUUDwac=",
       "dev": true
     },
+    "cors": {
+      "version": "2.8.5",
+      "resolved": "https://registry.npmjs.org/cors/-/cors-2.8.5.tgz",
+      "integrity": "sha512-KIHbLJqu73RGr/hnbrO9uBeixNGuvSQjul/jdFvS/KFSIH1hWVd1ng7zOHx+YrEfInLG7q4n6GHQ9cDtxv/P6g==",
+      "dev": true,
+      "requires": {
+        "object-assign": "^4",
+        "vary": "^1"
+      }
+    },
     "crc32-stream": {
       "version": "0.3.4",
       "resolved": "https://registry.npmjs.org/crc32-stream/-/crc32-stream-0.3.4.tgz",
@@ -3528,6 +3533,7 @@
         "accepts": "~1.3.4",
         "base64id": "2.0.0",
         "cookie": "0.3.1",
+        "cors": "~2.8.5",
         "debug": "~4.1.0",
         "engine.io-parser": "git+https://github.com/socketio/engine.io-parser.git#v4",
         "ws": "^7.1.2"
@@ -10973,12 +10979,9 @@
       }
     },
     "ws": {
-      "version": "6.1.4",
-      "resolved": "https://registry.npmjs.org/ws/-/ws-6.1.4.tgz",
-      "integrity": "sha512-eqZfL+NE/YQc1/ZynhojeV8q+H050oR8AZ2uIev7RU10svA9ZnJUddHcOUZTJLinZ9yEfdA2kSATS2qZK5fhJA==",
-      "requires": {
-        "async-limiter": "~1.0.0"
-      }
+      "version": "7.2.1",
+      "resolved": "https://registry.npmjs.org/ws/-/ws-7.2.1.tgz",
+      "integrity": "sha512-sucePNSafamSKoOqoNfBd8V0StlkzJKL2ZAhGQinCfNQ+oacw+Pk7lcdAElecBF2VkLNZRiIb5Oi1Q5lVUVt2A=="
     },
     "xml2js": {
       "version": "0.4.23",

package.json

@@ -31,7 +31,7 @@
     "indexof": "0.0.1",
     "parseqs": "0.0.5",
     "parseuri": "0.0.5",
-    "ws": "~6.1.0",
+    "ws": "~7.2.1",
     "xmlhttprequest-ssl": "~1.5.4",
     "yeast": "0.1.2"
   },