Feature Proposal: make git tag choosable be lightweight or annotated

[moznion]

Hello,

At the moment, this plugin makes a git tag as annotated mode (with -a option).

sbt-release/src/main/scala/Vcs.scala

Line 163 in fa38be3

cmd(withFlags(List(GitFlag(sign, "s")))("tag", "-f", "-a", name, "-m", comment): _*)

Some tools can't recognize the annotated tags certainly ― for example, [release-drafter/release-drafter#615] (but this has already been fixed) ― so I think it would be useful if this mode is configurable.

What do you feel about this? If you think this is good, I have the preparation for this feature.