* merge (#6)

* [running] fix multiprocessing bugs (#547)

* [running] fix multiprocessing bugs

* fix tests

* [docs] Fix typo in docs (#549)

* ⬆️ Bump conda-incubator/setup-miniconda from 2 to 3 (#551)

Bumps [conda-incubator/setup-miniconda](https://github.com/conda-incubator/setup-miniconda) from 2 to 3.
- [Release notes](https://github.com/conda-incubator/setup-miniconda/releases)
- [Changelog](https://github.com/conda-incubator/setup-miniconda/blob/main/CHANGELOG.md)
- [Commits](https://github.com/conda-incubator/setup-miniconda/compare/v2...v3)

---
updated-dependencies:
- dependency-name: conda-incubator/setup-miniconda
  dependency-type: direct:production
  update-type: version-update:semver-major
...

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* updates  (#550)

* [running] fix multiprocessing bugs

* fix tests

* [doc] update doc

* update

* [math] add `brainpy.math.gpu_memory_preallocation()` for controlling GPU memory preallocation

* [math] `clear_buffer_memory` support to clear array and compilation both

* [dyn] compatible old version of `.reset_state()` function

* [setup] update installation info

* ``brainpy.math.defjvp`` and ``brainpy.math.XLACustomOp.defjvp`` (#554)

* [running] fix multiprocessing bugs

* fix tests

* [doc] update doc

* update

* [math] add `brainpy.math.gpu_memory_preallocation()` for controlling GPU memory preallocation

* [math] `clear_buffer_memory` support to clear array and compilation both

* [dyn] compatible old version of `.reset_state()` function

* [setup] update installation info

* [install] upgrade dependency

* updates

* [math] add `brainpy.math.defjvp`, support to define jvp rules for Primitive with multiple results. See examples in `test_ad_support.py`

* [math] add `brainpy.math.XLACustomOp.defjvp`

* [doc] upgrade `brainpy.math.defjvp` docstring

* ⬆️ Bump actions/setup-python from 4 to 5 (#555)

Bumps [actions/setup-python](https://github.com/actions/setup-python) from 4 to 5.
- [Release notes](https://github.com/actions/setup-python/releases)
- [Commits](https://github.com/actions/setup-python/compare/v4...v5)

---
updated-dependencies:
- dependency-name: actions/setup-python
  dependency-type: direct:production
  update-type: version-update:semver-major
...

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Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

---------

Signed-off-by: dependabot[bot] <support@github.com>
Co-authored-by: Sichao He <1310722434@qq.com>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

* [math] add experimental `brainpy.math.exprel`

* [delay] move delays in models of `brainpy.synapses` module into new delay register API `DynamicalSystem.register_local_delay()` and `DynamicalSystem.get_local_delay()`

* [math & dyn] add `brainpy.math.exprel`, and change the code in the corresponding HH neuron models to improve numerical computation accuracy

---------

Signed-off-by: dependabot[bot] <support@github.com>
Co-authored-by: Sichao He <1310722434@qq.com>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>