Bumps [websocket-extensions](https://github.com/faye/websocket-extensions-node) from 0.1.3 to 0.1.4. **This update includes a security fix.**
- [Release notes](https://github.com/faye/websocket-extensions-node/releases)
- [Changelog](https://github.com/faye/websocket-extensions-node/blob/master/CHANGELOG.md)
- [Commits](https://github.com/faye/websocket-extensions-node/compare/0.1.3...0.1.4)
Signed-off-by: dependabot-preview[bot] <support@dependabot.com>

Bumps [uglify-js](https://github.com/mishoo/UglifyJS2) from 3.8.1 to 3.9.1.
- [Release notes](https://github.com/mishoo/UglifyJS2/releases)
- [Commits](https://github.com/mishoo/UglifyJS2/compare/v3.8.1...v3.9.1)
Signed-off-by: dependabot-preview[bot] <support@dependabot.com>

This is to try and make it clearer that this method won't override
initialization settings, and is instead simply to add to the default
settings.

This is a problem that could occur when calling converse.initialize twice

Credit for this work goes to @deleolajide

Fixes #2040

- Render chat content as a <converse-chat-content> component
- Create new component for rendering the message body
- Get rid of `showMessage` method