publish-documentation.sh clobbers local clone

[1ec5]

publish-documentation.sh prunes branches and hollows out the clone into a shallow clone:

mapbox-directions-swift/scripts/publish-documentation.sh

Line 17 in 871940c

git fetch --depth=1 --prune

This is very inconvenient for the development team, forcing us to reclone the repository every time we publish documentation (or avoid the script, which doesn’t do much in the first place).

Thanks to @S2Ler for the suggestion.

/ref #467
/cc @mapbox/navigation-ios