🪲 [Fix]: Obay module manifest overrides during tests (#48)

## Description

- Fixes #49 

## Type of change

<!-- Use the check-boxes [x] on the options that are relevant. -->

- [ ] 📖 [Docs]
- [x] 🪲 [Fix]
- [ ] 🩹 [Patch]
- [ ] ⚠️ [Security fix]
- [ ] 🚀 [Feature]
- [ ] 🌟 [Breaking change]

## Checklist

<!-- Use the check-boxes [x] on the options that are relevant. -->

- [x] I have performed a self-review of my own code
- [x] I have commented my code, particularly in hard-to-understand areas

Author: MariusStorhaug

.github/workflows/workflow.yml

@@ -378,14 +378,23 @@ jobs:
                 $path = Join-Path -Path $env:GITHUB_WORKSPACE -ChildPath "${{ inputs.ModulesOutputPath }}\$moduleName"
                 $moduleManifestPath = Join-Path -Path $Path -ChildPath "$moduleName.psd1"
 
+                # Obay module manifest overrides
+                $sourcePath = Join-Path -Path $env:GITHUB_WORKSPACE -ChildPath "${{ inputs.Path }}"
+                $sourceModuleManifestPath = Join-Path -Path $sourcePath -ChildPath "manifest.psd1"
+                if (Test-Path -Path $sourceModuleManifestPath) {
+                  $sourceManifest = Import-PowerShellDataFile -Path $sourceModuleManifestPath
+                }
+
                 $data = [pscustomobject]@{
                   ModuleName         = $moduleName
                   Path               = $path
                   ModuleManifestPath = $moduleManifestPath
                 }
                 Write-Verbose ($data | Format-List | Out-String) -Verbose
 
-                Set-ModuleManifest -Path $moduleManifestPath -PowerShellVersion '7.4'
+                # If the source module manifest has a PowerShellVersion, use that, otherwise use the latest version.
+                $powerShellVersion = $sourceManifest.PowerShellVersion ?? '7.4'
+                Set-ModuleManifest -Path $moduleManifestPath -PowerShellVersion $powerShellVersion
 
                 Add-ModuleManifestData -Path $moduleManifestPath -CompatiblePSEditions 'Core'
                 Add-ModuleManifestData -Path $moduleManifestPath -Tags 'PSEdition_Core'
@@ -403,6 +412,10 @@ jobs:
                 }
             }
 
+            LogGroup 'Module Manifest - Source' {
+                Show-FileContent -Path $moduleManifestPath
+            }
+
             LogGroup 'Module Manifest' {
                 Show-FileContent -Path $moduleManifestPath
             }

tests/srcWithManifest/manifest.psd1

@@ -1,3 +1,4 @@
 @{
-    Author = 'Author'
+    Author            = 'Author'
+    PowerShellVersion = '5.1'
 }