Support `createTagBefore` hook

[mantou132]

createTagBefore allows to replace the version number of files other than package.json before creating a release.

e.g:

• https://github.com/Polymer/lit-html/blob/259786bd472ea7abae0947a600303608b7fc5eff/src/lit-html.ts#L55
• https://github.com/mantou132/Spotify-Lyrics/blob/master/public/manifest.json#L3
• https://github.com/mantou132/gem/blob/master/src/lib/version.ts