Bump websocket-extensions from 0.1.2 to 0.1.4 in /examples/dom

Bumps [websocket-extensions](https://github.com/faye/websocket-extensions-node) from 0.1.2 to 0.1.4.
- [Release notes](https://github.com/faye/websocket-extensions-node/releases)
- [Changelog](https://github.com/faye/websocket-extensions-node/blob/master/CHANGELOG.md)
- [Commits](faye/websocket-extensions-node@0.1.2...0.1.4)

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

Author: dependabot[bot]

examples/dom/yarn.lock

@@ -6473,8 +6473,8 @@ websocket-driver@>=0.5.1:
     websocket-extensions ">=0.1.1"
 
 websocket-extensions@>=0.1.1:
-  version "0.1.2"
-  resolved "https://registry.yarnpkg.com/websocket-extensions/-/websocket-extensions-0.1.2.tgz#0e18781de629a18308ce1481650f67ffa2693a5d"
+  version "0.1.4"
+  resolved "https://registry.yarnpkg.com/websocket-extensions/-/websocket-extensions-0.1.4.tgz#7f8473bc839dfd87608adb95d7eb075211578a42"
 
 whatwg-encoding@^1.0.1:
   version "1.0.1"