fix: correct bug where commands hang on windows when retrieving stdout/stderr

[brianheineman]

Fixes #99

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Report	Sat, July 6, 2024 at 02:37:41 UTC
Project	theseus-rs/postgresql-embedded
Branch	correct-windows-hang
Testbed	localhost

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Benchmark	Latency	Latency Results nanoseconds (ns)
extract	➖ (view plot)	154,060.00
lifecycle	➖ (view plot)	1,231,000,000.00

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Codecov Report

Attention: Patch coverage is 96.66667% with 1 line in your changes missing coverage. Please review.

Project coverage is 99.58%. Comparing base (480faa8) to head (5e5aac0).

Files	Patch %	Lines
postgresql_commands/src/traits.rs	96.66%	1 Missing :warning:

Additional details and impacted files

```diff @@ Coverage Diff @@ ## main #105 +/- ## ========================================== + Coverage 99.56% 99.58% +0.02% ========================================== Files 78 78 Lines 8638 8583 -55 ========================================== - Hits 8600 8547 -53 + Misses 38 36 -2 ```

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