--gh-pages-tag doesn't work

[alundiak]

here is my task config:

'gh-pages':{
    options: {
        base: 'gh-gh',
        dotfiles: true,
        message: 'gh-pages updated',
        tag:'2.1.0'
    },
    src: '**'
}

Based on this config, when I execute first time grunt gh-pages, new tag pushed.
Next time - the same tag is not increasing (and would be nice feature, if next time during push, tag number increases).

But, if I have more new code changes, and I execute

grunt gh-pages --gh-pages-tag 'v2.1.1'

tag is not pushed.

No matter if task config has tag setting or not, using --gh-pages-tag has no effect.

Reproduced with:

• grunt-gh-pages v.0.10.0 and v1.0.0.
• grunt-cli v0.1.13
• grunt v0.4.5
• node v4.2.4
• npm v2.14.12

@tschaub any ideas?