Allow custom prerelease bumping strategy different from node semver

[Elenterius]

As of #273 pre-releases are no longer incremented and instead MAJOR.MINOR.PATCH are bumped and the same identifier.0 is appended.

Working as expected:

1.0.0 + MINOR --> 1.1.0-identifier.0
1.1.1 + PATCH --> 1.1.2-identifier.0
1.1.0 + MINOR --> 1.2.0-identifier.0
1.1.0 + MAJOR --> 2.0.0-identifier.0
2.2.0-identifier.0 + MAJOR --> 3.0.0-identifier.0

Unfavorable Behavior for me where the pre-release is reset instead of incremented:

1.0.1-identifier.0 + PATCH --> 1.0.2-identifier.0
1.1.0-identifier.0 + PATCH --> 1.1.1-identifier.0
1.1.0-identifier.0 + MINOR --> 1.2.0-identifier.0
2.0.0-identifier.0 + MAJOR --> 3.0.0-identifier.0

Bumping of pre-release in semver is fairly subjective and mostly left up to the developer as long as a valid potential future version is chosen. As such I would like to have the ability to change the behavior of this gh action with my own strategy and not be constrained to node's semver behavior.

I want to implement the following behavior:

1.0.1-identifier.0 + PATCH --> 1.0.1-identifier.1
1.1.0-identifier.0 + PATCH --> 1.1.0-identifier.1
1.1.0-identifier.0 + MINOR --> 1.1.0-identifier.1
2.0.0-identifier.0 + MAJOR --> 2.0.0-identifier.1
2.2.0-identifier.1 + MAJOR --> 3.0.0-identifier.0

function bumpVersionHook(oldVersion, releaseType, isPreRelease, identifier) {
    if (isPreRelease) {
        return bumpPreReleaseVersion(oldVersion, releaseType, identifier);
    }
    
    return semver.inc(oldVersion, releaseType, identifier);
}

function bumpPreReleaseVersion(oldVersion, releaseType, identifier) {
    const oldSemVersion = semver.parse(oldVersion);
    const isStable = oldSemVersion.prerelease.length === 0;

    if (!isStable) {
        const stableBase = semver.inc(oldSemVersion, releaseType);
        const oldBase = `${oldSemVersion.major}.${oldSemVersion.minor}.${oldSemVersion.patch}`;
        if (oldBase === stableBase) {
            console.log(`incrementing ${oldSemVersion.format()} with prerelease`);
            return semver.inc(oldSemVersion, "prerelease", identifier);
        }
    }
    
    console.log(`incrementing ${oldSemVersion.format()} with pre${releaseType}`);
    return semver.inc(oldSemVersion, `pre${releaseType}`, identifier);
}

Sadly I can't use the pre-changelog-generation.preVersionGeneration hook because it is lacking the oldVersion, releaseType, prerelease and identifier information which i need to for custom bump behavior.

Therefore i would like to request a new hook to replace the version bump behavior or provide all the missing information to the callback.