closes#3485
also fixed a bug in file creation for github: it was always searching
for the file in the default branch
also, we don't need to create the file first, update does both create
and update.
TODO: implement the for krew, scoop, etc...
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Signed-off-by: Carlos A Becker <caarlos0@users.noreply.github.com>
Carlos Alexandro Becker