change the diff function
change the diff function

the proposed change would remove the dependency of a diff binary
in favour of using a library

Signed-off-by: Sevki <a0f1490a20d0211c997b44bc357e1972deab8ae3@sevki.org>

google/go-jsonnet,sbarzowski/go-jsonnet,google/go-jsonnet,sbarzowski/go-jsonnet,sbarzowski/go-jsonnet,google/go-jsonnet,sbarzowski/go-jsonnet,sbarzowski/go-jsonnet,google/go-jsonnet,google/go-jsonnet