Travis CI: Drop "git.depth: 1" because subsequent pushes were failing ongoing builds
Travis CI: Drop "git.depth: 1" because subsequent pushes were failing ongoing builds

See 10c235458830fc894a6381cf6267246c68848adf for AppVeyor and more details.

libexpat/libexpat,libexpat/libexpat,libexpat/libexpat,libexpat/libexpat,libexpat/libexpat,libexpat/libexpat