xterm 2.2.3 on Node.js NPM

📢 Fixes issues with missing files in npm release after 2.2.2 (#414).

Xterm.js 2.2.0 is a generally uneventful release, except for the fact that we started 📢 migrating the code base to TypeScript.

📢 Started migrating the code base to TypeScript (#296, #353, #355, #370, #371, #372, #383, #392)
Added ttyd to real-world uses 🎉 (#347)
Documentation improvements for the open, scroll and title events (#351)
Implemented the ^\ string terminator (#377)
Further improvements in the scroll back feature introduced in 2.1.0 (#379, #367)
Cleaned up license declaration in the documentation (#388)
Fixed browser jumping issues when focusing on xterm (#391)

Bugfixes from 2.2.0

Checkout addons in dist/addons (b76b2d0)
Fix requiring xterm.js with Browserify and SystemJS when installed via npm (#398)
Fix missing CSS files in npm release of xterm.js (#416)