Features:
- adds support for (#203):
- H3C UniServer R4900 G6
- Dell PowerEdge XE9680
- HPE Cray XD670
- SuperMicro SYS-122FT
- Thermal reading for Dell iDRAC 9 and newer systems moved to ThermalSubsystem #195
Bugfixes:
- mitigates issue with HPE iLO 6 voltages reported as WARNING #193
- fixes issue with unavailable firmware list #199
- fixes issue if temp state is not a string #199
Possible breaking changes
- enforces performance data label guidelines #197 ("=" and "'" are now converted to "_")