ssdtools 2.2.0

• Added ssd_label_comma_hc() function to label numbers with significant digits and comma and offset hazard concentration value if present in breaks.
• Added ssd_dists_shiny() to define distributions for use in shiny app.
• For plot_coord_scale() function:
  • Added x_limits = NULL to allow setting of x-axis limits.
  • Added hc_value = NULL to pass hazard concentration value.
  • Restricted trans argument to "identity", "log10" or "log".
• For ssd_plot() function:
  • Added text_size argument.
  • Added theme_classic = FALSE argument to switch classic theme.
  • Soft-deprecated size argument for label_size.
• Turned off x-axis minor breaks for all plots (for consistency) as HC major break causing multiple minor breaks in ssd_plot().