Are there npm version prerelease identifiers?

Starting with npm 6.4.0 you can use the --preid option of npm version like this:

$ npm version prerelease --preid=alpha
v0.1.1-alpha.0
$ npm version prerelease --preid=alpha
v0.1.1-alpha.1
$ npm version prerelease --preid=alpha
v0.1.1-alpha.2