Valid "light" skin colors not allowed

[GitChub]

When choosing a skin (e.g. dashboardPage(skin = "green", ... ) ), the "light" skin color variants (green-light, blue-light, etc.) are not allowed by the shinydashboard package even though they seem to be valid skin colors in the included version of the AdminLTE theme.

[jwang-lilly]

This commit is not reflected in the latest version of shinydashboard as green-light is still not a valid color.