sgplot 0.4.0

• use_sgplot() gains a palette_type argument to set default palette type
  for geoms. The default value is "sg" to use Scottish Government colour palettes.
  To use the Social Security Scotland palette type, for example, use:
  use_sgplot(palette_type = "sss") (#34).

• The default_colour argument of use_sgplot() is deprecated in favour of the
  palette_type argument (#34).

sgplot 0.3.0

• Add Social Security Scotland colours (sss_colour_values) and palettes (sss_colour_palettes)
• Fix bug in use_sgplot() when passing arguments to theme_sg()

sgplot 0.2.2

• Fix links to contributing guidance in vignettes
• Update required roxygen version

sgplot 0.2.1

• Fix issue where scale_ functions didn't work without the package being loaded (#26)
• Add examples of using non-default colour palettes (#24)
• Add link to theme_sg() in use_sgplot() help file

sgplot 0.2.0

• Add Scottish Government Design System colour palettes
• Reduce base_line_size in theme_sg()
• Remove default dark blue outline from geom_col and geom_bar when using use_sgplot().

sgplot 0.1.0

• First package release
• Add functions to create accessible plots using ggplot2
• Add pkgdown site (https://datasciencescotland.github.io/sgplot) including cookbook