build(deps): bump xterm from 4.11.0 to 4.13.0 in /html (#701)

build(deps): bump xterm from 4.11.0 to 4.13.0 in /html (#701)

Bumps [xterm](https://github.com/xtermjs/xterm.js) from 4.11.0 to 4.13.0.
- [Release notes](https://github.com/xtermjs/xterm.js/releases)
- [Commits](https://github.com/xtermjs/xterm.js/compare/4.11.0...4.13.0)

---
updated-dependencies:
- dependency-name: xterm
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

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