fix template

Author: enricosada

nuget/paket.template

@@ -17,8 +17,12 @@ projecturl http://fsprojects.github.com/Paket
 iconurl https://raw.githubusercontent.com/fsprojects/Paket/master/docs/files/img/logo.png
 tags
     nuget, bundler, F#
+packageTypes
+    DotnetTool
 files
     ../bin/merged/paket.exe ==> tools
     ../bin/merged/paket.exe ==> tools/net45
     ../bin_netcore/**/* ==> tools/netcoreapp2.0
 
+dependencies
+  framework: .NETCoreApp2.1