Base library update
- Bump of base libraries to version 1.3.9 (RF24), 1.0.13 (RF24N) , 1.1.3(RF24M) #20
- Speed of SPI interface is now configurable in the constructor. #15
- Now the module is tested to compile against node versions 10, 12, 14 on arm32 and arm64 environments.
- Fix compilation on node version 8
- Added EnableLna for better support radio boards with amplifiers and Si24R1 clones.
- Some doc improvements