Add multiple values in target_fixture

[codecov[bot]]

Codecov Report

Patch coverage: 100.00% and project coverage change: +0.02 :tada:

Comparison is base (d45c543) 95.40% compared to head (d7522fc) 95.43%.

:exclamation: Current head d7522fc differs from pull request most recent head 6c46b40. Consider uploading reports for the commit 6c46b40 to get more accurate results

Additional details and impacted files

```diff @@ Coverage Diff @@ ## master #611 +/- ## ========================================== + Coverage 95.40% 95.43% +0.02% ========================================== Files 49 49 Lines 1764 1773 +9 Branches 193 195 +2 ========================================== + Hits 1683 1692 +9 Misses 53 53 Partials 28 28 ``` | [Impacted Files](https://codecov.io/gh/pytest-dev/pytest-bdd/pull/611?src=pr&el=tree&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=pytest-dev) | Coverage Δ | | |---|---|---| | [src/pytest\_bdd/scenario.py](https://codecov.io/gh/pytest-dev/pytest-bdd/pull/611?src=pr&el=tree&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=pytest-dev#diff-c3JjL3B5dGVzdF9iZGQvc2NlbmFyaW8ucHk=) | `93.15% <100.00%> (+0.14%)` | :arrow_up: | | [tests/steps/test\_given.py](https://codecov.io/gh/pytest-dev/pytest-bdd/pull/611?src=pr&el=tree&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=pytest-dev#diff-dGVzdHMvc3RlcHMvdGVzdF9naXZlbi5weQ==) | `100.00% <100.00%> (ø)` | | 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=pytest-dev). 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=pytest-dev)

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