Enable data-driven styling functions for as many layout properties as possible

[lucaswoj]

follow-up to #1932

[danielduhh]

Any update on data-driven values for fill-color?

[mourner]

@danielduhh it's already implemented in 0.19.

[josiekre]

v0.19 works for fill-color. Just tested it.

[jfirebaugh]

The documentation of individual properties on https://www.mapbox.com/mapbox-gl-style-spec/ (e.g. fill-color) now includes a version support matrix that details support for data-driven styles. We're going to keep this updated as we roll out support for data-driven styling of more properties.

[sdawson26]

Is the next step getting to line-color and text-color? I'm hoping we're close to more data-driven features. Thanks for all of your hard work!

[mourner]

@sdawson26 line-color is just around the corner, see #2938

[jfirebaugh]

⇢ #4434.