Now Github Actions are in use for some checks and continuous integration.

removed compiler warnings
racing condition in noDataSince function.

Pull request:

• #17 Remove unnecessary comarisons

Issues:

• #18 Build is "noisy" when Arduino Compiler Warnings = All selected.
• #19 Build warning when Compler Warnings = All (Part 2)
• #20 Build warning when Compler Warnings = All (Part 3)

Sensor support added.

fixed datatype Errors.

some corrections to make the library usable in the Arduino Library Manager