Add composer.js to let PHP developers to keep track of svgedit on packagist.org.
Add composer.js to let PHP developers to keep track of svgedit on packagist.org.

thewenneur/svgedit,SVG-Edit/svgedit,thewenneur/svgedit,thewenneur/svgedit,thewenneur/svgedit,SVG-Edit/svgedit,SVG-Edit/svgedit