Arduino Device Lib Versions Save

• Improve handling of needsHardReset flag and add method to check valid module connected to serial port (#282)

This is a hot fix for v2.7.0 that broke support in US915.

• Feature upgrades for ABP, add errorReadout, poll after Retry Class A and more (#277)

• Avoid compiler warnings (https://github.com/TheThingsNetwork/arduino-device-lib/pull/250)
• Fix needsHardReset in readLine() (https://github.com/TheThingsNetwork/arduino-device-lib/pull/256)
• Fix include (https://github.com/TheThingsNetwork/arduino-device-lib/pull/258)
• Support Class C (https://github.com/TheThingsNetwork/arduino-device-lib/pull/260)

Fixed documentation typo

• Hard reset and indicator (#244)
• Enhanced documentation (#247)

• Fix regression for SAMD boards (#246)

• Fix build for ESP32 and other non-AVR platforms (#243)

• Use Arduino's legacy keywords.txt spacing (#238)
• Fix links in documentation (#240)

• Fixes AU915 uplink data rate (#236)