Changed version from 3.1.0 to 3.1.1.

Removed unused variables. Updated dates.

Merge branch 'main' of https://github.com/CMB27/ModbusRTUSlave

Updated README.md.

Changed version from 2.0.5 to 2.0.6.

Changed version from 2.0.4 to 2.0.5.

Increased version to 2.0.4.

Update library.properties

changed version to 2.0.3

Tweaked README fromatting.

Delete .development