Ikpy

Update citation metadata

What's Changed
* Update bibtex by Phylliade in https://github.com/Phylliade/ikpy/pull/152
* Update CITATION.cff by Phylliade in https://github.com/Phylliade/ikpy/pull/153
* Update _version.py by Phylliade in https://github.com/Phylliade/ikpy/pull/154


**Full Changelog**: https://github.com/Phylliade/ikpy/compare/v3.4.1...v3.4.2

This is a technical release, with no new features

Add support for DH parameters, thanks to https://github.com/Tanneguydv, through https://github.com/Phylliade/ikpy/pull/143
And new robot, the Robotis, thanks to https://github.com/zaksadiq, through https://github.com/Phylliade/ikpy/pull/148

Add a new `optimizer` parameter in `Chain.inverse_kinematics` to select the optimizer to use:


The optimizer to use. Choices:
* "least_squares": Use scipy.optimize.least_squares (the default)
* "scalar": Use scipy.optimize.minimize (the default prior to IKPy 3.3)

Technical release to add DOI information

Activate Zenedo DOI