Specify library dependencies in library.properties

Specifying the library dependencies in the depends field of library.properties causes the Arduino Library Manager (Arduino IDE 1.8.10 and newer) to offer to install any missing dependencies during installation of this library. "arduino-cli lib install" will automatically install the dependencies (arduino-cli 0.7.0 and newer).

Author: per1234

library.properties

@@ -6,4 +6,5 @@ sentence=PS2 keyboard codes from PS2KeyAdvanced to UTF-8 for any Latin language
 paragraph=Takes integer values from PS2KeyAdvanced to convert using selectable country mapping and you can add your own country mapping.
 category=Other
 url=https://github.com/techpaul/PS2KeyMap.git
-architectures=avr,sam
+architectures=avr,sam
+depends=PS2KeyAdvanced