Simple example using gulp-bump and yargs to manage version.

gulp-bump-with-yargs

'use strict';

var gulp = require('gulp'),
  $ = require('gulp-load-plugins')({
    pattern: [
      'gulp-*',
      'yargs'
    ]
  });

$.yargs
.alias('h', 'help')
.describe('help', 'Show this help information.')
.check (function (argv) {
  if (argv.help) {
    throw new Error ('Help!');
  }
});

gulp.task('bump', function () {
  var argv, opts;
  argv = $.yargs.usage(
    'Bump the package version. ' +
    'With no options, bumps to the next patch version. ' +
    'Usage: gulp bump [--major | --minor | --patch | --to x.x.x]'
    )
    .options({
      major: {
        describe: 'Bump the package to the next major version (1.x.x to 2.0.0)'
      },
      minor: {
        describe: 'Bump the package to the next minor version (1.0.x to 1.1.0)'
      },
      patch: {
        describe: 'Bump the package to the next patch version (1.0.0 to 1.0.1)'
      },
      to: {
        describe: 'Bump the package to the specified version'
      }
    }).check(function (argv) {
      if (argv.major && argv.minor) {
        throw new Error('Cannot specify both major and minor');
      } else if (argv.major && argv.patch) {
        throw new Error('Cannot specify both major and patch');
      } else if (argv.major && argv.to) {
        throw new Error('Cannot specify both major and version');
      } else if (argv.minor && argv.patch) {
        throw new Error('Cannot specify both minor and patch');
      } else if (argv.minor && argv.to) {
        throw new Error('Cannot specify both minor and version');
      } else if (argv.patch && argv.to) {
        throw new Error('Cannot specify both patch and version');
      }
    }).argv;
  opts = argv.to ? {
    version: argv.to
  } : argv.major ? {
    type: 'major'
  } : argv.minor ? {
    type: 'minor'
  } : {
    type: 'patch'
  };
  return gulp.src([
    './bower.json',
    './package.json'
  ])
  .pipe($.bump(opts))
  .pipe(gulp.dest('./'));
});