add codingABI/KY040

[codingABI]

A library for KY-040 rotary encoders

[github-actions]

Arduino Lint has suggestions for possible improvements to https://github.com/codingABI/KY040:

Linting library in KY040
WARNING: Incorrect Arduino.h filename case in #include directive: KY040/src/KY040.h:52: #include <arduino.h> (Rule      
         LC001)                                                                                                         

Linter results for project: 0 ERRORS, 1 WARNINGS

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Linting sketch in KY040/examples/pinChangeInterrupt

Linter results for project: no errors or warnings

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Linting sketch in KY040/examples/pinChangeInterruptDualEncoders

Linter results for project: no errors or warnings

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Linting sketch in KY040/examples/pinChangeInterruptPowerSave

Linter results for project: no errors or warnings

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Linting sketch in KY040/examples/pollingNoInterrupts

Linter results for project: no errors or warnings

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Linting sketch in KY040/examples/withInterrupt

Linter results for project: no errors or warnings

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Linter results for projects: 0 ERRORS, 1 WARNINGS

[github-actions]

Your submission has now been accepted! Thanks for your contribution to the Arduino Library Manager index.

The library(s) will be available for installation via Library Manager within a day's time.

You can check the logs from the Library Manager indexer for your library(s) here:
http://downloads.arduino.cc/libraries/logs/github.com/codingABI/KY040/