Sipann

Maintenance update and drop support for Python 3.6.

Added
- None

Changed
- Bug fix for `SimphonyWrapper` class in `scee_int.py`. Changed tuple of `str` to `PinList`. [Check this PR for more details.](https://github.com/BYUCamachoLab/SiPANN/pull/24)
- Bug fix in `nn.py` [See here for more info.](https://github.com/BYUCamachoLab/SiPANN/pull/29)
- Code cleanup [See here for more info.](https://github.com/BYUCamachoLab/SiPANN/pull/27)

Removed
- Support for Python 3.6

Maintenance update.

Added
- None

Changed
- Correct "invalid ports" errors (fixed some conditional statements).

Removed
- None

Maintenance update.

Added
- None

Changed
- Code cleanup (changed some syntax to be more Pythonic).
- Modified some code to work with the latest version of
[Simphony](https://github.com/BYUCamachoLab/simphony).

Removed
- None

This version is mostly a maintenance update. We have added

* Continuous Integration via github actions
* precommit hooks to keep code maintained
* Small bug fix in `SiPANN.scee.Waveguide`. It should now work properly with `SiPANN.scee_int.SimphonyWrapper`.

Officially now includes inverse design optimizer module. More info can be found in the docs. API is 100% documented along with 2 tutorials on how to use it! Enjoy.

Official release of the `SiPANN.scee_int` module. This module includes functions to allow for integration into both Lumerical Interconnect and Simphony. Previously all `SiPANN.scee` models had their own simphony wrapper, but now for simplicity you only have to pass a SCEE model into `SiPANN.scee_int.SimphonyWrapper` to integrate into simphony.