Ton-client-py

- Internal refactor: methods' return types suggestion are correct and clear now;

- Binaries updated to `1.27.0`;
- Changes `1.26.0` (https://github.com/tonlabs/TON-SDK/blob/master/CHANGELOG.md#1260--2021-11-25);
- Changes `1.26.1` (https://github.com/tonlabs/TON-SDK/blob/master/CHANGELOG.md#1261--2021-12-01);
- Changes `1.27.0` (https://github.com/tonlabs/TON-SDK/blob/master/CHANGELOG.md#1270--2021-12-03);

- Binaries updated to `1.25.0`;
- Changes `1.25.0` (https://github.com/tonlabs/TON-SDK/blob/master/CHANGELOG.md#1250--2021-11-08);

- Binaries updated to `1.24.0`;
- Changes `1.24.0` (https://github.com/tonlabs/TON-SDK/blob/master/CHANGELOG.md#1240--2021-10-18);

- Binaries updated to `1.23.0`;
- Changes `1.23.0` (https://github.com/tonlabs/TON-SDK/blob/master/CHANGELOG.md#1230--2021-10-05);

- Binaries updated to `1.22.0`;
- Changes `1.22.0` (https://github.com/tonlabs/TON-SDK/blob/master/CHANGELOG.md#1220--2021-09-20);