Features
--------
- Add ``PytmcSignal``
- Add ``PPM``, ``XPIM``, ``XOffsetMirror``, and ``Kmono`` classes
- Update ``IPM`` and ``PIM`` modules to better match physical devices
- Add various helper classes for TwinCAT devices
- Stubs created for attenuators, ``RTD``, and ``PowerSlit``
- Make ``cmd_err_reset`` in ``BeckhoffAxisPLC`` accessible in Typhos
API Changes
-----------
- Changed ``set_point_relay`` to ``pump_on_status``, ``at_vac_sp`` to
``at_vac_setpoint`` and added ``pump_state`` to ``PIPPLC``
- Changed ``at_vac_sp`` to ``at_vac_setpoint``, ``at_vac_hysterisis``
to ``setpoint_hysterisis``, and added mps_state to ``VGC``
Bugfixes
--------
- Make ``protection_setpoint`` writeable in ``GCCPLC``
- Make ``state`` writeable in ``VCN``
Misc
----
- Allow build docs failure to speed up overall CI
- Specify old working conda version as temporary solution for
build failures