Saturation is not that good

[KidsDontPlay]

Expected Behavior

The saturation makes good results.

(Made with Gimp)

Current Behavior

The saturation makes no good results.

The colors are quite 'abrupt'.

Original:

Failure Information (for bugs)

Steps to Reproduce

        jimp.read(Buffer.concat(buffers), (error, value) => {
            value.color([{apply:"saturate",params:[-70]}],console.log)
            value.write("a.png")
        });

Context

• Jimp Version: 0.10.2
• Operating System: Kubuntu
• Node version: 10.16.0

Failure Logs

[adduss]

@KidsDontPlay saturation and desaturation is using external https://www.npmjs.com/package/tinycolor2 lib. It is moving px by px and call it (https://github.com/jimp-dev/jimp/blob/main/packages/plugin-color/src/index.js#L105).