Py-pde

What's Changed
* Minor improvements by david-zwicker in https://github.com/zwicker-group/py-pde/pull/308
* Improved documentation by david-zwicker in https://github.com/zwicker-group/py-pde/pull/313
* Adjusted to newer numba_mpi by david-zwicker in https://github.com/zwicker-group/py-pde/pull/314
* Improve diagnostic output of pde.PDE by david-zwicker in https://github.com/zwicker-group/py-pde/pull/315


**Full Changelog**: https://github.com/zwicker-group/py-pde/compare/v0.22.3...v0.22.4

What's Changed
* Added py-pde logo to the repository by david-zwicker in https://github.com/zwicker-group/py-pde/pull/300
* Improved traceback when exception occurred during missing cache hit by david-zwicker in https://github.com/zwicker-group/py-pde/pull/298
* Improved documentation by david-zwicker in https://github.com/zwicker-group/py-pde/pull/303
* Improved operators with complex boundary conditions by david-zwicker in https://github.com/zwicker-group/py-pde/pull/304
* Fixed two edge cases in OnlineStatistics and progress bars by david-zwicker in https://github.com/zwicker-group/py-pde/pull/305
* Support field collections in MPI by david-zwicker in https://github.com/zwicker-group/py-pde/pull/306
* Improved field interpolation by david-zwicker in https://github.com/zwicker-group/py-pde/pull/307


**Full Changelog**: https://github.com/zwicker-group/py-pde/compare/v0.22.2...v0.22.3

What's Changed
* Reduced error tolerance of adaptive explicit solver by david-zwicker in https://github.com/zwicker-group/py-pde/pull/285
* Fixed a bug in applying BCs defined by expressions by david-zwicker in https://github.com/zwicker-group/py-pde/pull/287
* Improved documentation by david-zwicker in https://github.com/zwicker-group/py-pde/pull/288
* Improved documentation of BCs by david-zwicker in https://github.com/zwicker-group/py-pde/pull/289
* Removed some deprecated functions by david-zwicker in https://github.com/zwicker-group/py-pde/pull/290
* Add `num_cells` property to grids by david-zwicker in https://github.com/zwicker-group/py-pde/pull/291
* Minor improvements by david-zwicker in https://github.com/zwicker-group/py-pde/pull/292
* Change default BCs by david-zwicker in https://github.com/zwicker-group/py-pde/pull/293
* Allow kwargs when evaluating evolution rates by david-zwicker in https://github.com/zwicker-group/py-pde/pull/296
* Emit warning when state has been modified strongly by david-zwicker in https://github.com/zwicker-group/py-pde/pull/297


**Full Changelog**: https://github.com/zwicker-group/py-pde/compare/v0.22.1...v0.22.2

What's Changed
* Adjust adaptive time stepping so that interrupts are hit exactly by david-zwicker in https://github.com/zwicker-group/py-pde/pull/282
* `environment` now shows right packages by david-zwicker in https://github.com/zwicker-group/py-pde/pull/283
* Improved typing by david-zwicker in https://github.com/zwicker-group/py-pde/pull/284


**Full Changelog**: https://github.com/zwicker-group/py-pde/compare/v0.22.0...v0.22.1

This release is the first one supporting multiprocessing using MPI. Details are discussed in [the documentation](https://py-pde.readthedocs.io/en/latest/manual/performance.html#multiprocessing-using-mpi).

What's Changed
* Added basic MPI support for multiprocessing by david-zwicker in https://github.com/zwicker-group/py-pde/pull/280
* Added conservative double divergence for spherical grids by david-zwicker in https://github.com/zwicker-group/py-pde/pull/274
* Allow selecting multiple fields from a collection by david-zwicker in https://github.com/zwicker-group/py-pde/pull/276
* Bumped required numpy version to 1.22 by david-zwicker in https://github.com/zwicker-group/py-pde/pull/277
* Fixed a bug when same Interrupt object was used in different trackers by david-zwicker in https://github.com/zwicker-group/py-pde/pull/278

**Full Changelog**: https://github.com/zwicker-group/py-pde/compare/v0.21.0...v0.22.0

What's Changed
* Added FieldCollection.from_dict classmethod by david-zwicker in https://github.com/zwicker-group/py-pde/pull/262
* Allow specifying boundaries by name by david-zwicker in https://github.com/zwicker-group/py-pde/pull/269
* Refactored tracker intervals by david-zwicker in https://github.com/zwicker-group/py-pde/pull/267
* Improve parsing of sympy expressions by david-zwicker in https://github.com/zwicker-group/py-pde/pull/264
* Improved storage of information about adaptive time stepping by david-zwicker in https://github.com/zwicker-group/py-pde/pull/265
* Replace numpy.inf with math.inf by david-zwicker in https://github.com/zwicker-group/py-pde/pull/268
* Broadcast scalar results in `evaluate` by david-zwicker in https://github.com/zwicker-group/py-pde/pull/266
* Fixed type issue in Parameterized by david-zwicker in https://github.com/zwicker-group/py-pde/pull/261


**Full Changelog**: https://github.com/zwicker-group/py-pde/compare/v0.20.0...v0.21.0