render enum in table

[greyli]

Please add some tests for this change and update the changelog.

[PanderMusubi]

Tests are already in https://github.com/helloflask/bootstrap-flask/pull/271/commits/3e5507d1b9773231ee7af0dd5bcfc8ab668ae7ac#diff-5041814f41c9cf2e44c8ee9ec3f448747d7f32492b0d0586f4eda9b7f69a6b27

Update of changes is in https://github.com/helloflask/bootstrap-flask/pull/271/commits/b8f87c9150c7720b364dc5930a639d0ab9fdf837

[codecov-commenter]

Codecov Report

Patch coverage has no change and project coverage change: +97.01 :tada:

Comparison is base (ef208ca) 0.00% compared to head (b8f87c9) 97.01%.

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Additional details and impacted files

```diff @@ Coverage Diff @@ ## master #271 +/- ## =========================================== + Coverage 0 97.01% +97.01% =========================================== Files 0 1 +1 Lines 0 134 +134 Branches 0 17 +17 =========================================== + Hits 0 130 +130 - Misses 0 1 +1 - Partials 0 3 +3 ``` | [Impacted Files](https://codecov.io/gh/helloflask/bootstrap-flask/pull/271?src=pr&el=tree&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=helloflask) | Coverage Δ | | |---|---|---| | [flask\_bootstrap/\_\_init\_\_.py](https://codecov.io/gh/helloflask/bootstrap-flask/pull/271?src=pr&el=tree&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=helloflask#diff-Zmxhc2tfYm9vdHN0cmFwL19faW5pdF9fLnB5) | `97.01% <0.00%> (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=helloflask). 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=helloflask)

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[PanderMusubi]

@greyli can you review this? Thanks.