code: function inc(importance) {
    console.log(" ----  >>>  Don't forget: $ git push --tag");
    return gulp.src(['./package.json' ])
      .pipe(plugins.bump({type: importance}))
      .pipe(gulp.dest('./'))
      .pipe(plugins.git.commit('bumps package version'))
      .pipe(plugins.filter('package.json'))
      // .pipe(plugins.tagVersion());
      // FIXME
      // See https://github.com/ikari-pl/gulp-tag-version/issues/4
  }
docs: from https://github.com/ikari-pl/gulp-tag-version