Added build script for module versioning

build.ps1

@@ -0,0 +1,18 @@
+[CMDletBinding()]
+Param()
+
+if ((Get-Command -Name 'gitversion' -ErrorAction 'SilentlyContinue' | Measure-Object).Count -eq 0) {
+    throw 'gitversion must be installed'
+}
+
+$version = gitversion | ConvertFrom-Json
+$versionString = $version.NuGetVersion
+Write-Information -MessageData "Calculated Module Version: $versionString"
+
+$rawManifest = Get-Content -Path "$PSScriptRoot/PwshZendesk.psd1" -raw
+Write-Debug -Message "Raw Manifest:`n$rawManifest"
+
+$updatedManifest = $rawManifest -replace "ModuleVersion\s*=\s*['`"][0-9.]+['`"]", "ModuleVersion = '$versionString'"
+Write-Debug -Message "Updated Manifest:`n$updatedManifest"
+
+$updatedManifest | Out-File -Path "$PSScriptRoot/PwshZendesk.psd1" -NoNewline

gitversion.yml

@@ -0,0 +1 @@
+mode: Mainline