feat: use `jiti` for typescript configurations

[alexander-akait]

fixes https://github.com/webpack-contrib/postcss-loader/issues/646 This PR contains a:

• [ ] bugfix
• [x] new feature
• [ ] code refactor
• [x] test update
• [ ] typo fix
• [ ] metadata update

Motivation / Use-Case

Avoid extra big dependecies, also fix problems for cjs and mjs

Breaking Changes

Hope no

Additional Info

No

[codecov[bot]]

Codecov Report

Patch coverage: 100.00% and project coverage change: +0.10 :tada:

Comparison is base (54c195e) 89.50% compared to head (96b599d) 89.60%.

Additional details and impacted files

```diff @@ Coverage Diff @@ ## master #649 +/- ## ========================================== + Coverage 89.50% 89.60% +0.10% ========================================== Files 5 5 Lines 362 356 -6 Branches 118 114 -4 ========================================== - Hits 324 319 -5 + Misses 35 34 -1 Partials 3 3 ``` | [Impacted Files](https://codecov.io/gh/webpack-contrib/postcss-loader/pull/649?src=pr&el=tree&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=webpack-contrib) | Coverage Δ | | |---|---|---| | [src/utils.js](https://codecov.io/gh/webpack-contrib/postcss-loader/pull/649?src=pr&el=tree&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=webpack-contrib#diff-c3JjL3V0aWxzLmpz) | `85.65% <100.00%> (+0.05%)` | :arrow_up: |

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[alexander-akait]

Hope we don't break this again