feature/anonymous-vote

[pavlochernovyy]

Changes:

• Feature according to Issue #7
• Indentations according to prettier.config.js

Implementation:

1. Add preferences key as using setObject with schema:

      {
        "_id": "5d741c2b28b4307fd76f05b1",
        "_key": "poll:6:options:1:preferences:1",
        "anonymous": true,
        "uid": 1
    }

2. While fetching users verify is their option is anonymous. In case it is - replace it with anonymous.

TODO:

1. Add support of transliteration for Vote anonymously button. Please let me know in comments what is proper way to make it.

[bobfang1992]

Is there a plan to get this merged? Thanks!