USBKeyboard "Hello world" example (LEDs setting removed as we don't have LEDs)

Dependencies:   mbed USBDevice

Revision:
0:060ef37bda98
diff -r 000000000000 -r 060ef37bda98 USBDevice.lib
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/USBDevice.lib	Thu Jun 16 12:55:34 2022 +0000
@@ -0,0 +1,1 @@
+https://os.mbed.com/users/mbed_official/code/USBDevice/#53949e6131f6