Update publish power shell script.

Author: wangfu91

.gitignore

@@ -29,3 +29,4 @@ obj
 /UsnParser/publish
 /tool
 /publish
+/release

Publish.ps1

@@ -0,0 +1,23 @@
+$rids = "win-x64", "win-x86"
+
+Push-Location .\UsnParser
+
+foreach ($rid in $rids) {
+    dotnet publish -c release -r $rid --self-contained -o ..\publish\$rid /p:PublishSingleFile=true /p:PublishTrimmed=true
+}
+
+Pop-Location
+
+New-Item -ItemType "directory" -Name "release" -Force
+
+foreach ($rid in $rids) {
+    $path = ".\publish\$rid"
+    
+    $compress = @{
+        Path             = $path
+        CompressionLevel = "Optimal"
+        DestinationPath  = ".\release\UsnParser-$rid.zip"
+    }
+
+    Compress-Archive @compress -Force
+}