function inc(importance) {
    // get all the files to bump version in
    return gulp.src(['./package.json'])
        // bump the version number in those files
        .pipe(bump({type: importance}))
        // save it back to filesystem
        .pipe(gulp.dest('./'))
        // commit the changed version number
        .pipe(git.commit('Bumps package version'))
        // read only one file to get the version number
        .pipe(filter('package.json'))
        // **tag it in the repository**
        .pipe(tagVersion({
            prefix: ''
        }));
}
/*.js' ];

/**
Bumping version number and tagging the repository with it.
Please read http://semver.org/

You can use the commands

    gulp patch     # makes v0.1.0 -> v0.1.1
    gulp feature   # makes v0.1.1 -> v0.2.0
    gulp release   # makes v0.2.1 -> v1.0.0

To bump the version numbers accordingly after you did a patch,
introduced a feature or made a backwards-incompatible release.