MIDI Tick is Not Compliant MIDI

[eclab]

"MIDI Tick" (Status byte 0xF9) is not part of the MIDI 1.0 Specification and is not conformant. Status byte 0xF9 is reserved. I am interested in hearing the history of MIDI Tick, but to the best of my knowledge it was made up out of whole cloth by the MIDI Technical Fanatic's Brainwashing Center and should not be promulgated as part of the Arduino library.

See also https://www.midi.org/specifications-old/item/table-2-expanded-messages-list-status-bytes

Please:

1. Revise MIDIType.Tick to MidiTypeUndefined_F9 in midi.h
2. Deprecate TickCallback in midi.h