Build-PSModule: Fix error when there are multiple got committees. (#9)

* Build-PSModule: Fix error when there are multiple git committers.

* Update build.ps1

* Only get committers from the module folder

Author: thisjustin816

build.ps1

@@ -1,6 +1,6 @@
 $BuildPSModule = @{
     Name        = 'PSModuleUtils'
-    Version     = '1.6.0'
+    Version     = '1.6.1'
     Description = 'A module with helper functions to build and publish PowerShell modules to the PSGallery.'
     Tags        = ('PSEdition_Desktop', 'PSEdition_Core', 'Windows')
 }

src/public/Build-PSModule.ps1

@@ -1,4 +1,4 @@
-<#
+<#
 .SYNOPSIS
 Builds a PowerShell module formatted like the ones located at github.com/thisjustin816.
 
@@ -138,7 +138,7 @@ function Build-PSModule {
     $moduleVersion, $modulePrerelease = $Version -split '-', 2
     $newModuleManifest = @{
         Path = $manifestPath
-        Author = ( & git log --format='%aN' | Sort-Object -Unique )
+        Author = (( & git log --format='%aN' -- . | Sort-Object -Unique ) -join ', ')
         CompanyName = $companyName
         Copyright = "(c) $( Get-Date -Format yyyy ) $companyName. All rights reserved."
         RootModule = "$Name.psm1"