fix: handle messages of type poll

[krowter]

closes #50

Notes

• apparently quiz mode polls have the same data as non-quiz (it doesn't have correct_answer). So no need to handle that case

[codecov[bot]]

Codecov Report

All modified and coverable lines are covered by tests :white_check_mark:

Project coverage is 96.37%. Comparing base (e9f23a6) to head (c67eb8a).

Additional details and impacted files

```diff @@ Coverage Diff @@ ## master #53 +/- ## ========================================== + Coverage 95.93% 96.37% +0.44% ========================================== Files 1 1 Lines 369 414 +45 Branches 51 53 +2 ========================================== + Hits 354 399 +45 Misses 15 15 ```

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