Problem: New version suggestions in update confirmation buffer might
include semver tags that were committed later but for versions that
are not greater than current. Like if versions committed in order
`v0.2.0` - `v0.3.0` - `v0.2.1` - `v0.3.1`, then when on `v0.3.0` both
`v0.2.1` and `v0.3.1` are suggested, but only the latter is newer as
a version. This is because those tags are computed with post-processed
`git tag --list --contains HEAD`.
Solution: Compute all semver tags and filter only those greater than the
latest version available at HEAD.
89a72f11e5