Update color space type definitions for three.js r152

[donmccurdy]

Why

three.js r152+ will contain a number of changes related to color management, including:

• Replace WebGLRenderer#outputEncoding with WebGLRenderer#outputColorSpace
• Replace Texture#encoding with Texture#colorSpace
• Replace WebGLRenderTarget 'encoding' option with 'colorSpace'
• Change default renderer output to sRGB

What

This PR updates the affected properties to values for r152, based on mrdoob/three.js#23614. I've intentionally kept the deprecated properties in the type definitions with @deprecated tags, hoping this will make for an easier migration.

Checklist

• Checked the target branch (current goes master, next goes dev)
• Added myself to contributors table
• Ready to be merged

Submitting as draft for now, until the upstream changes are merged. Ready for review. r152 will be released later this week.

[Methuselah96]

Thanks!