Bump websocket-extensions from 0.1.4 to 0.1.5

Bumps [websocket-extensions](https://github.com/faye/websocket-extensions-ruby) from 0.1.4 to 0.1.5. - [Release notes](https://github.com/faye/websocket-extensions-ruby/releases) - [Changelog](https://github.com/faye/websocket-extensions-ruby/blob/master/CHANGELOG.md) - [Commits](faye/websocket-extensions-ruby@0.1.4...0.1.5) Signed-off-by: dependabot[bot] <support@github.com>

Author: dependabot[bot]

Gemfile.lock

@@ -209,7 +209,7 @@ GEM
  rack (>= 2.0.6)
  websocket-driver (0.6.5)
  websocket-extensions (>= 0.1.0)
- websocket-extensions (0.1.4)
+ websocket-extensions (0.1.5)
 
 PLATFORMS
  ruby