deeptime 2.1.0

This new minor version of deeptime introduces several new features and bug fixes.

New features:

• Added default label color values to all built-in data as a new lab_color column
  • The label colors are either white or black, whichever has better contrast with the background color based on recommendations by the International Telecommunication Union
• get_scale_data() now returns label colors (as above) for Macrostrat timescales
• Varying strip label colors can now be set with the lab_colors argument in facet_wrap_color() and facet_grid_color() (#68)
  • By default, the strip label colors are set to white or black (as above)
• Added facet_nested_color() and facet_nested_wrap_color() to plot nested faceted plots with colored strips (#55)
• get_scale_data() documentation now lists the available Macrostrat timescales (#69)
• get_scale_data() now supports partial matching to Macrostrat timescales (e.g., get_scale_data("mammal") will retrieve the "North American land mammal ages" timescale)

Notable changes:

• The FGDC pattern data added in deeptime 2.0.0 has been moved to a new data R package called deeptimedata to reduce the size of the deeptime package and the footprint of future deeptime updates

Bug fixes:

• Fixed importing some functions from ggplot2 for coord_geo_radial() and coord_geo_polar()