Fix --syslog-writer extention on Python3

[fliiiix]

Fixes #442

• [x] fix behaviour or test for windows as we don't have syslog on windows

[codecov[bot]]

Codecov Report

Base: 85.98% // Head: 87.17% // Increases project coverage by +1.19% :tada:

Coverage data is based on head (922faae) compared to base (59694b7). Patch coverage: 71.42% of modified lines in pull request are covered.

Additional details and impacted files

```diff @@ Coverage Diff @@ ## main #444 +/- ## ========================================== + Coverage 85.98% 87.17% +1.19% ========================================== Files 39 39 Lines 2347 2347 ========================================== + Hits 2018 2046 +28 + Misses 329 301 -28 ``` | Flag | Coverage Δ | | |---|---|---| | unittests | `87.17% <71.42%> (+1.19%)` | :arrow_up: | Flags with carried forward coverage won't be shown. [Click here](https://docs.codecov.io/docs/carryforward-flags?utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=radish-bdd#carryforward-flags-in-the-pull-request-comment) to find out more. | [Impacted Files](https://codecov.io/gh/radish-bdd/radish/pull/444?src=pr&el=tree&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=radish-bdd) | Coverage Δ | | |---|---|---| | [radish/extensions/syslog\_writer.py](https://codecov.io/gh/radish-bdd/radish/pull/444/diff?src=pr&el=tree&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=radish-bdd#diff-cmFkaXNoL2V4dGVuc2lvbnMvc3lzbG9nX3dyaXRlci5weQ==) | `94.23% <71.42%> (+53.84%)` | :arrow_up: | Help us with your feedback. Take ten seconds to tell us [how you rate us](https://about.codecov.io/nps?utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=radish-bdd). Have a feature suggestion? [Share it here.](https://app.codecov.io/gh/feedback/?utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=radish-bdd)

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