v0.4.0 CSET was a static site generator all along!?

Containing many months of work, this release contains many usability improvements, new generic operators, and a big change to the output, where it is now generated as handily viewable HTML pages.

What's Changed

• Update version to 0.4.0 by @jfrost-mo in #180
• Postage stamp plots by @jfrost-mo in #160
• Add collapse operator with corresponding yaml file and changes by @Sylviabohnenstengel in #168
• Make plot.contour_plot and write.write_cube_to_nc return a cube by @jfrost-mo in #183
• Postage stamp plot fix by @jfrost-mo in #181
• Document collapse operator by @jfrost-mo in #185
• Refactor tests to use PyTest helpers by @jfrost-mo in #177
• Document installing CSET into its own environment by @jfrost-mo in #198
• Update README.md by @Sylviabohnenstengel in #206
• Use hash of updated lock files in branch name by @jfrost-mo in #201
• Add note on updating a cloned repository by @jfrost-mo in #190
• Skip build-docs on push to main by @jfrost-mo in #200
• Python 3.12 support by @jfrost-mo in #202
• Update README.md by @Sylviabohnenstengel in #225
• Update README.md by @Sylviabohnenstengel in #226
• Update why-cset.rst by @Sylviabohnenstengel in #227
• Fix globbing for lock file hashing by @jfrost-mo in #229
• Update index.rst by @Sylviabohnenstengel in #228
• Update index.rst by @Sylviabohnenstengel in #230
• Use static branch name while updating lock files by @jfrost-mo in #245
• Swap out flake8 for Ruff by @jfrost-mo in #218
• Including aggregate operator. by @Sylviabohnenstengel in #241
• Fix filter operator for filtering cube by @daflack in #258
• Fix pre-commit mangling test data by @jfrost-mo in #273
• Improve tutorials by @jfrost-mo in #209
• Model level constraint operator by @Sylviabohnenstengel in #272
• Plot generation improvements by @jfrost-mo in #274

New Contributors

• @daflack made their first contribution in #258

Full Changelog: v0.3.0...v0.4.0