bump required pwshlib to 1.2.0 and greater

[jordanbreen28]

bumps the minimum required puppetlabs/pwshlib to 1.2.0, as dsc_timeout logic is only present in these module versions.

Summary

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Additional Context

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• [ ] Root cause and the steps to reproduce. (If applicable)
• [ ] Thought process behind the implementation.

Related Issues (if any)

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Checklist

• [ ] 🟢 Spec tests.
• [ ] 🟢 Acceptance tests.
• [ ] Manually verified.

[codecov[bot]]

Codecov Report

Attention: Patch coverage is 0% with 1 line in your changes missing coverage. Please review.

Project coverage is 19.70%. Comparing base (3adb824) to head (8a29e94). Report is 6 commits behind head on main.

Files	Patch %	Lines
...internal/functions/Update-PuppetModuleMetadata.ps1	0.00%	1 Missing :warning:

Additional details and impacted files

```diff @@ Coverage Diff @@ ## main #298 +/- ## ======================================= Coverage 19.70% 19.70% ======================================= Files 47 47 Lines 868 868 ======================================= Hits 171 171 Misses 697 697 ```

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