v0.7.0

What's changed

Added

• new features box_search and zone_search in cdshealpix.nested
• cdshaelpix.nested.vertices can now take depth as a numpy.ndarray instead of only
  accepting a single depth
• new module skymap added.
• read/write, and plot nested all-sky skymaps in the implicit scheme from fits files with
  Skymap.from_fits, Skymap.from_array, Skymap.quick_plot, and Skymap.to_fits

Fixed

• ⚠️ breaking change. All fully_covered returned values have changed from arrays
  of 0 and 255 to boolean arrays. This concerns: box_search, cone_search,
  polygon_search, elliptical_cone_search, and elliptic-search.
• bilinear_interpolation now accepts longitudes and latitudes with nan values
  (will be a masked value in the output) [#22]
• nested.healpix_to_lonlat, failed into rust panic for dx=1 or dy=1. This is
  now indicated in the documentation and is catched in a ValueError on the python side.

Changed

• matplotlib is now an optional dependency, to plot previews of skymaps.

Full Changelog: v0.6.5...v0.7.0