Aiosmsru

**🎉Callcheck**
In this release:
- Fix callcheck status code

**🎉 Callcheck**
In this release:
- Add callcheck method

**🎉 Doc-strings and type-hints**
In this release:
- Add doc-strings for all api-methods
- Add type hints to where they weren't

**🎉 New methods and partner_id**
In this release:
- Add `.senders()`, `.check_auth()` and `.stoplist()` methods
- Add my partner_id code 🧡

**🎉 New methods**
In this release:
- Add `.balance()`, `.limit()` and `.free_limit()` methods
- Make the `param` argument (in `._request(...)`) optional

**🎉 Initial release**
In this release:
- Send SMS
- Check SMS status
- Get SMS cost