tidyterra 0.2.0

• Recreate extdata/volcano2.tif using official DEM information from New
  Zealand. Source: Auckland LiDAR 1m DEM
  (2013).

• Add volcano2 dataset.

• Fix errors on slice_min() and slice_max() for SpatRasters (#20). Also
  add a new parameter na.rm.

• Add new gradient scales for use on hypsometry:

  • scale_fill_hypso_c()
  • scale_fill_whitebox_c()
  • scale_fill_wiki_c()
  • scale_fill_cross_blended_c()

• Add new asia.tif file on extdata.

What's Changed

• Update README by @dieghernan in #17
• Rebuild volcano2 tif by @dieghernan in #18
• Add volcano2 dataset by @dieghernan in #19
• Fix slice_min/max by @dieghernan in #21
• Add new topo palette by @dieghernan in #22
• Add hypsometric tints by @dieghernan in #24
• Add hypsometric tints by @dieghernan in #25
• Add cross blend colors by @dieghernan in #26
• Adjust palettes by @dieghernan in #27
• Improve docs by @dieghernan in #28
• Update scales by @dieghernan in #29
• Add new scales by @dieghernan in #31
• Remove ptr reference by @dieghernan in #32

Full Changelog: v0.1.0...v0.2.0