add codingABI/DFR0534

[s-light]

add codingABI/DFR0534
a library for the DFRobot MP3 Modul

[github-actions]

Arduino Lint has suggestions for possible improvements to https://github.com/codingABI/DFR0534:

Linting library in DFR0534
WARNING: Incorrect Arduino.h filename case in #include directive: DFR0534/src/DFR0534.h:24: #include <arduino.h> (Rule  
         LC001)                                                                                                         

Linter results for project: 0 ERRORS, 1 WARNINGS

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Linting sketch in DFR0534/examples/playCombined

Linter results for project: no errors or warnings

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Linting sketch in DFR0534/examples/playFileByName

Linter results for project: no errors or warnings

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Linting sketch in DFR0534/examples/playFileByNumber

Linter results for project: no errors or warnings

-------------------

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/DFR0534/