Restrict the search for sestest.dll to within the out/sestest directory (#98)

sestest.ps1

@@ -5,7 +5,7 @@
 # Find the latest version of sestest that was compiled
 # [This will automatically find the right version, even if someone does a release 
 # build or if the output path changes e.g. becuase it's no longer netcoreapp2.0]
-$sestest = get-childitem $PSScriptRoot\out\sestest.dll -recurse | sort-object LastWriteTimeUtc | select-object -last 1
+$sestest = get-childitem $PSScriptRoot\out\sestest\sestest.dll -recurse | sort-object LastWriteTimeUtc | select-object -last 1
 
 if ($sestest -eq $null) 
 {