Use `JSON.stringify(data, null, '\t')` instead of `js-beautify` when outputting  json.
Update vue.js
Add feature: draft auto saving.
Remove `Export into multi-sizes` button.
bugfix.
Add text effect: `bold`, `italic`, `underline`.
Automatic underline thickness.
Vertical align mode of text layer changed to fit underline style.
Resize style changed.
Canvas default resize with 2x, for better anti-aliasing on `devicePixelRatio = 1` devices.
bugfix
Multi-line & line-height support for text layer.