Flag to return always the alpha value even if it's 1

[lsunol]

On the toRgbString method, I think it would be useful (at least for me) if there could be an option to get always the alpha value even if that is 1.
Now, if you call the toRgbString method of the red color you get:
> var a = tinycolor('red');
> a.toRgbString()
< rgb(255, 0, 0)
Would be great if I could do
> a.toRgbString(true)
< rgba(255, 0, 0, 1)
Many thanks

[aivarasbiliunas]

If someone would still need it a quick and nice fix for this would be

const rgb = tinycolor('red'):
const withAlpha = `rgba(${rgb.r}, ${rgb.g}, ${rgb.b}, ${rgb.a})`;

[CrandellWS]

CrandellWS@4661a69