npm setPackageVersion semver2 support

[cdunford]

setPackageVersion is a nice helper function to update the version in a package.json file. Today it looks like it will always spit out a semver1 version. It would be nice if it could be parameterized to support semver2, as npm as semver2 support.

[AArnott]

Does NPM support semver2 consistently everywhere, or should it be an option for folks to use semver1 or 2? And which should be the default.

[AArnott]

I'm finding semver2 usage as far back as six years ago here (history page). So it sure seems like semver2 should be the default (and in fact only) option.