* Update/fix RTD docs URL refs in various places * Update PDM + dev. + docs deps
0.18.1
* Fix anomaly with simple form uniqueness of elements in `ContinuedFraction.extend` op (addresses issue 127 ) * Improvements and updates to the Sphinx docs * Minor tweaks to the project TOML & Read the Docs build config.
0.18.0
* Add CI support for Python 3.13 * Update docs * Update dev. & docs dependencies
0.17.7
* Minor tweaks to the docs + update of dev. deps
0.17.6
* Minor code quality improvements * Update dev. and docs dependencies
0.17.5
* Upgrade Sphinx and other dev. dependencies * Minor content improvements in the Sphinx docs * Minor CI improvements