feat(version): Allow for prereleases flags and prerelease identifiers

[daniseijo]

Summary

This pull request implements the feature requested in #6059 and #5367

It adds four new flags (--premajor|--preminor|--prepatch|--prerelease) to allow automatic increment of new prereleases.

It also adds a new flag --preid to add a custom identifier to the new prerelease

Test plan

Example:

$ yarn version --premajor --preid beta
info Current version: 1.3.0
info New version: 2.0.0-beta.0

I've included Jest test cases for each of the new versioning flags.

This feature only adds new flags and should not modified the previous behaviour of version.

[arcanis]

That seems good to me - can you update the changelog (at the root of the repository) before I merge it?

[daniseijo]

There you have it!

[buildsize]

File name	Previous Size	New Size	Change
yarn-[version].noarch.rpm	1.18 MB	1.18 MB	52 bytes (0%)
yarn-[version].js	4.85 MB	4.85 MB	953 bytes (0%)
yarn-legacy-[version].js	5.04 MB	5.04 MB	953 bytes (0%)
yarn-v[version].tar.gz	1.18 MB	1.18 MB	2.23 KB (0%)
yarn_[version]all.deb	868.28 KB	868.34 KB	62 bytes (0%)

[bodinsamuel]

Great feature 🙌
It's not documented in the website though !