Use the official tool again

Author: mattleibow

.config/dotnet-tools.json

@@ -17,7 +17,7 @@
       "rollForward": false
     },
     "api-tools": {
-      "version": "1.4.1",
+      "version": "1.4.2-preview.2",
       "commands": [
         "api-tools"
       ],

nuget-diff.cake

@@ -40,7 +40,7 @@ if (!nupkgs.Any()) {
 				.AppendQuoted(nupkg.FullPath)
 				.Append(version)
 				.Append("--prerelease")
-				.Append("--prefer-released")
+				.Append("--prefer-release")
 				.Append("--group-ids")
 				.Append("--ignore-unchanged")
 				.Append("--compare-nuget-structure")