Release v3.4.0

[steven-murray]

v3.4.0

Performance

• When reading in data from cache, only read the necessary fields.

Deprecations

• Python <3.9 is no longer supported.

Fixed

• Fixed small issue in Lightcone.lightcone_coords.
• Bug when setting NON_CUBIC_FACTOR != 1.
• Using new matplotlib versions and registering cmap.
• Small bug in lightcone interpolation.

Added

• New Lightconer base class with user-facing classes RectilinearLightconer and AngularLightconer. These are now the recommended way to define how lightcones should be created. Note that these are not the final lightcone object, but simply a "definition" for how to create the lightcone.
• The Lightcone class still exists, but is now joined by an AngularLightcone class that is the output lightcone when using the AngularLightconer definition.
• New KEEP_3D_VELOCITIES user-param. This is required to be True if you want to apply RSDs to an AngularLightcone.
• Ability to check-point lightcone creation, so that it can be resumed later. Simply pass the lightcone_fname argument to run_lightcone.
• New cache_tools.get_boxes_at_redshift function to get all boxes at a given redshift, regardless of the parameters used to create them.
• New CosmoParams.from_astropy() classmethod for constructing a cosmo params object directly from an astropy cosmology.

Internals

• Refactored RSDs to the subcell_rsds.c C-module.
• Added CI testing of the docs tutorials.
• More precise debugging summaries of boxes in the C code.

Fixed

• Incorrect sign on adiabatic fluctuations.
• Spurious warnings about boxes being read.
• Spurious warnings about configuration files being out of date.
• Compilation for clang and newer gcc versions.

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Codecov Report

Attention: Patch coverage is 88.60104% with 66 lines in your changes missing coverage. Please review.

Project coverage is 82.19%. Comparing base (f75560c) to head (3dc9953). Report is 204 commits behind head on production.

Files	Patch %	Lines
src/py21cmfast/outputs.py	79.34%	13 Missing and 6 partials :warning:
src/py21cmfast/_utils.py	56.00%	9 Missing and 2 partials :warning:
src/py21cmfast/lightcones.py	95.76%	4 Missing and 4 partials :warning:
src/py21cmfast/wrapper.py	93.75%	2 Missing and 6 partials :warning:
src/py21cmfast/_cfg.py	30.00%	4 Missing and 3 partials :warning:
src/py21cmfast/cli.py	76.66%	4 Missing and 3 partials :warning:
src/py21cmfast/cache_tools.py	82.85%	5 Missing and 1 partial :warning:

Additional details and impacted files

```diff @@ Coverage Diff @@ ## production #416 +/- ## ============================================== - Coverage 86.33% 82.19% -4.14% ============================================== Files 12 13 +1 Lines 2780 3140 +360 Branches 0 854 +854 ============================================== + Hits 2400 2581 +181 - Misses 380 400 +20 - Partials 0 159 +159 ```

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