Currently `brew bump` will output `unable to get versions` for the
livecheck (or Repology) version if it's lower than the current
package version. This makes it impossible to distinguish between a
failing livecheck and one where the livecheck version is lower. We can
detect when the package version is newer than the upstream version but
`bump` doesn't do anything to handle the situation.
This addresses the issue by updating `bump` to display the lower
upstream version and flag the current version with a trailing "(newer
than upstream)" parenthetical to make the situation apparent (and so
we can easily search for this text in the output).
b22d2328b7