ggstatsplot 0.7.2

MAJOR CHANGES

• To reduce the dependency load, ggExtra moves from Imports to
  Suggests.

• All functions are more robust in the sense that when statistical analysis
  fails, they will return only the plots with no subtitles/captions. This
  helps avoid difficult-to-diagnose edge case failures when the primary
  functions are used in grouped_ functions (e.g., #559). The ggpiestats
  and ggbarstats functions always behaved this way, but the rest of the
  functions now also mimic this behavior.

MINOR CHANGES

• The ggcoefstats labels do not contain degrees of freedom when they are not
  available instead of displaying Inf.