Add Anton to copyright notice.
Add Anton to copyright notice.

Signed-off-by: Anton Lundin <0a6ca81d300dbabb82140c80e76039139ef86644@acc.umu.se>

henrik242/libdivecomputer,glance-/libdivecomputer,henrik242/libdivecomputer,glance-/libdivecomputer,Poltsi/libdivecomputer-vms