Install dependencies (melonjs & servor) and run!
npm install
npm run watch
The melonJS dependency can be exchanged by a local copy with
npm i /path/to/melonjs/repo
The upper NineSliceSprite have it's width/height updated
The lower one have it's nss_width/nss_height
Note that the upper sprite size is always fixed at the original values, while the lower one rescales correctly.