Depend on py39+ & typing enhancements

[codecov-commenter]

Codecov Report

Patch coverage: 95.71% and project coverage change: +0.34 :tada:

Comparison is base (5658716) 97.16% compared to head (b4f49da) 97.50%.

Additional details and impacted files

```diff @@ Coverage Diff @@ ## master #114 +/- ## ========================================== + Coverage 97.16% 97.50% +0.34% ========================================== Files 10 10 Lines 1128 1124 -4 ========================================== Hits 1096 1096 + Misses 32 28 -4 ``` | [Impacted Files](https://codecov.io/gh/dalibo/pgtoolkit/pull/114?src=pr&el=tree&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=dalibo) | Coverage Δ | | |---|---|---| | [pgtoolkit/\_helpers.py](https://codecov.io/gh/dalibo/pgtoolkit/pull/114?src=pr&el=tree&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=dalibo#diff-cGd0b29sa2l0L19oZWxwZXJzLnB5) | `92.85% <ø> (-0.13%)` | :arrow_down: | | [pgtoolkit/ctl.py](https://codecov.io/gh/dalibo/pgtoolkit/pull/114?src=pr&el=tree&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=dalibo#diff-cGd0b29sa2l0L2N0bC5weQ==) | `86.33% <66.66%> (+1.97%)` | :arrow_up: | | [pgtoolkit/conf.py](https://codecov.io/gh/dalibo/pgtoolkit/pull/114?src=pr&el=tree&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=dalibo#diff-cGd0b29sa2l0L2NvbmYucHk=) | `98.98% <100.00%> (+<0.01%)` | :arrow_up: | | [pgtoolkit/errors.py](https://codecov.io/gh/dalibo/pgtoolkit/pull/114?src=pr&el=tree&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=dalibo#diff-cGd0b29sa2l0L2Vycm9ycy5weQ==) | `100.00% <100.00%> (ø)` | | | [pgtoolkit/hba.py](https://codecov.io/gh/dalibo/pgtoolkit/pull/114?src=pr&el=tree&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=dalibo#diff-cGd0b29sa2l0L2hiYS5weQ==) | `100.00% <100.00%> (ø)` | | | [pgtoolkit/log/\_\_main\_\_.py](https://codecov.io/gh/dalibo/pgtoolkit/pull/114?src=pr&el=tree&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=dalibo#diff-cGd0b29sa2l0L2xvZy9fX21haW5fXy5weQ==) | `100.00% <100.00%> (ø)` | | | [pgtoolkit/log/parser.py](https://codecov.io/gh/dalibo/pgtoolkit/pull/114?src=pr&el=tree&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=dalibo#diff-cGd0b29sa2l0L2xvZy9wYXJzZXIucHk=) | `100.00% <100.00%> (ø)` | | | [pgtoolkit/pgpass.py](https://codecov.io/gh/dalibo/pgtoolkit/pull/114?src=pr&el=tree&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=dalibo#diff-cGd0b29sa2l0L3BncGFzcy5weQ==) | `100.00% <100.00%> (ø)` | | | [pgtoolkit/service.py](https://codecov.io/gh/dalibo/pgtoolkit/pull/114?src=pr&el=tree&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=dalibo#diff-cGd0b29sa2l0L3NlcnZpY2UucHk=) | `97.56% <100.00%> (+0.03%)` | :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=dalibo). 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=dalibo)

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