Revert "version bump to 2.2.0"

This reverts commit b54f12b.

[melonjs#617] fixed globalAlpha not being set when using `me.Font.set…

…Opacity()`

Normalize whitespace.

Set `index` to 0 by default for `getShape()` and fixed the function d…

…escription

this will help avoid basic issue/exception when migrating from 1.1.0

WebGL: Reference only the stuff that we actually need to access later.

updated changelog

[melonjs#560] fixed entity position when manually updating their posi…

…tion

[melonjs#544] added a collision handler and made the emoji bounce whe…

…n colliding

[melonjs#545] removed the old jsdoc template

small look refresh for documentation : more flat and flashy to be mor…

…e in line with the "melonJS" green and blog color scheme