Prep for 2.0.0 release

Summary: Update package versions, as well as dependencies for new projects.

Reviewed By: mikearmstrong001

Differential Revision: D5949818

fbshipit-source-id: 71cb9c6

Release 1.4.0

Release 1.3.0

Release 1.2.0

add opacity prop type to color layout

Summary: color and opacity are paired and should be in the same layout style definition. this adds opacity to color

Reviewed By: andrewimm

Differential Revision: D5018424

fbshipit-source-id: 31d2d79

Initial commit

fbshipit-source-id: d824f6c0bc73943e6f652110a3eb550e2f0f0f46