Fix pending type errors

Closes #33

See merge request !32

In MBW973 device: refactor config tests, fix type check errors, format (black), and copyright notice

In MBW973 device: refactor config tests, fix type check errors, use f-strings, format (black), and copyright notice

In Heinziger devices: wait time config settings, config tests, fix type check errors, format (black), and copyright notice

In RTO1024 device: wait time config opts, refactor invalid config tests, fix type check errors, format (black), and copyright notice

In PSI9000 device: wait time config opts, refactor config errors tests, fixed type check errors, format (black), and copyright notice

In ILS2T device: wait time config opts, clean config values, tests for config errors, refactor inline max int32, fixed type check errors, format (black), and copyright notice

In OPC-UA comm protocol: improved error handling and corresponding tests, speed-up tests, format (black)

In OPC-UA comm protocol: add if open test, add wrapper for comm errors, fix type check errors, use f-strings, and add copyright notice

In LabJack device and comm protocol: fix type check errors, format (black), and add docs; add typing_extensions dependency for Py 3.8 typing.Literal

In experiment manager: fix type check errors, use f-strings incl. bugfix, format (black), and copyright notice

fixed line length and removed mention of self.config.model.full_scale_ranges for get/set_full_scale_range_unitless docstring

PressureUnits to NameEnum, init self.sensors = [], check fsr values in get/set_full_scale_range_mbar/unitless

In supercube2015: re-factor T13 socket ports constant, fix type check errors, use f-strings, format (black), and copyright notice + in supercube: move T13 socket port constant to constants

In supercube: re-factor T13 socket ports constant, fix type check errors, use f-strings, format (black), and copyright notice