Add PDK v1.18.1 (#3535)

manifests/Puppet/pdk/1.18.1.yaml

@@ -0,0 +1,19 @@
+---
+
+Id: Puppet.pdk
+Version: 1.18.1
+Name: Puppet Development Kit
+Publisher: Puppet, Inc
+License: Apache 2.0
+LicenseUrl: https://github.com/puppetlabs/pdk/blob/master/LICENSE
+AppMoniker: pdk
+Tags: puppet, puppetlabs
+Homepage: https://github.com/puppetlabs/pdk
+Installers:
+  - Arch: x64
+    Url: https://downloads.puppetlabs.com/windows/puppet6/pdk-1.18.1.0-x64.msi
+    Sha256: 50A4C0E000117950B6C498B9B9F165B36EFC582C0F8EB9DF95C65D4CCCDBFD04
+    InstallerType: msi
+    Switches:
+      Silent: '/qn /norestart'
+Commands: pdk