ggpointless 0.2.0

New features

• New geom_fourier() and stat_fourier() fit a truncated Fourier series
  (via stats::fft()) to x/y data and render the reconstructed curve.
  Supports optional detrending ("lm" or "loess") and harmonic selection
  via n_harmonics (#7).

• New geom_arch() and stat_arch() draw inverted catenary curves (arches)
  between successive points, complementing the existing geom_catenary() (#4).

• New geom_area_fade() draws area charts where the fill colour fades from
  opaque to transparent using grid::linearGradient(). The fade target alpha
  is controlled via alpha_fade_to (#3).

• New geom_point_glow() draws points with a radial gradient glow behind
  each point using grid::radialGradient(). The glow alpha, colour, and size
  can be customised via glow_alpha, glow_colour, and glow_size (#6).

Breaking changes

• The bundled (but outdated) datasets co2_ml, covid_vac, and female_leaders have been
  removed from the package. These datasets can be obtained from their
  original sources: Mauna Loa CO2,
  CDC vaccination data,
  and Wikipedia female leaders,
  respectively. The vignette("examples") that showcased these datasets has
  been removed alongside them.

Improvements

• The package now requires R >= 4.2.0 and ggplot2 >= 4.0.0. Several geoms
  take (mostly internal) advantage of new ggplot2 features such as
  make_constructor(), and gg_par().

• Messages and errors across the package have been migrated to the cli and
  rlang packages, giving consistent, hyperlink-aware output.

• geom_catenary() gained a vectorized chain_length argument and
  deprecated chainLength instead (#4).

• stat_catenary() no longer wrongfully removes data points when the upper
  limit in ylim() is set to the maximum y-value of the dataset (#1).