hp34970-firmware: File revisions

lib/keypad/Keypad.h

Mon, 04 Oct 2021 21:15:35 +0200	David Douard	Clean several compilation warnings draft	file \| diff \| annotate
Thu, 15 Oct 2020 01:11:03 +0200	David Douard	Several stuff draft	file \| diff \| annotate
Mon, 28 Jan 2019 21:51:45 +0100	David Douard	Add the (missing?) Keypad lib draft	file \| diff \| annotate

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