v2.9.0 addColorStop with opacity 0

[ShaMan123]

Issue or Feature

Issue, might be related to #2043

Steps to Reproduce

Add a color stop with opacity 0,
The opacity is ignored and treated as 1

const canvas = createCanvas(200, 200);
const ctx = canvas.getContext("2d");
const gradientFrom = "rgba(53,83,192,0.9)"
const gradientTo = "rgba(58,69,110,0)" // opacity 0
const gradient = ctx.createLinearGradient(0, 0, 0, 400)
gradient.addColorStop(0, gradientFrom)
gradient.addColorStop(1, gradientTo)
ctx.fillStyle = gradient;
ctx.fillRect(0, 0, 200, 200);
// etc.

see output for corresponding opacity

Your Environment

• Version of node-canvas (output of npm list canvas or yarn list canvas): 2.9.0+
• Environment (e.g. node 4.2.0 on Mac OS X 10.8): node v16.14.2 on Windows 10 64bit

[ShaMan123]

Tested on v2.8.0 and it works as expected

[H3r3zy]

Will be fix in 2.10.1 #2110

[zbjornson]

v2.10.1 is out, thanks for the fix @H3r3zy

[ShaMan123]

Thanks guys!