v3.4.0 release

What's Changed

• New inverter protocol added! 🍾BYD Battery-Box H, 7x modules. This CAN protocol can be used with the SMA Sunny Boy Storage inverter, and with the Kostal Plenticore inverter!
• USB Serial printout now runs much faster! 🚀 9600 -> 115200 , remember to set the new baud rate in the serial monitor window!
  
• Tesla batteries
  • Improved serial printout for Tesla batteries
• Nissan LEAF batteries:
  • Fixed an issue where signed values wouldn't be handled properly
  • USB printing made more user friendly with correct scalings
  • Fixed an issue where the Charging/Discharging/Idle field would show wrong values

Pull requests included

• Improvements to debug output for Tesla batteries. by @matvey83 in #66
• Leaf print refactor by @dalathegreat in #67
• SMA BYD CAN by @dalathegreat in #68
  Full Changelog: v3.3.0...v3.4.0