`git push --follow-tags origin master` while working on different branches and `--tag prerelease` not omitted with private package

[Morishiri]

Hi,

The finish up message is set up to always display information about master branch even while user is using different one.

It may lead to unpushed changes etc. IMO user should be notified with proper command here.

I noticed that this information is printed here: https://github.com/conventional-changelog/standard-version/blob/master/lib/lifecycles/tag.js so simple git branch discovery wil be enough here.

I will try to fix that if this issue is valid for you.

Also for the --tag prerelease is always displayed, but npm publish only when package is not private.