fix: Invalid serialization when overwriting out-of-order table key (#417)

- Updated pyproject.toml to use the new dependency grouping format for dev dependencies.
- Added a test for overwriting out-of-order tables in the TOML document parser.
- Enhanced the OutOfOrderTableProxy class to better manage the insertion of tables and plain values, ensuring correct handling of overwrites and maintaining the integrity of the internal structure.

Signed-off-by: Frost Ming <[email protected]>

Author: frostming

CHANGELOG.md

@@ -6,6 +6,13 @@
 
 - Add `.item()` method to array and tables to retrieve an item by key. ([#390](https://github.com/python-poetry/tomlkit/issues/390))
 
+### Fixed
+
+- Fix repeated whitespace when removing an array item. ([#405](https://github.com/python-poetry/tomlkit/issues/405))
+- Fix invalid serialization after removing array item if the comma is on its own line. ([#408](https://github.com/python-poetry/tomlkit/issues/408))
+- Refine the error message when use non-string as single key. ([#412](https://github.com/python-poetry/tomlkit/issues/412))
+- Fix invalid serialization after overwriting a key of a out-of-order table. ([#414](https://github.com/python-poetry/tomlkit/issues/414))
+
 ## [0.13.2] - 2024-08-14
 
 ### Fixed