Use Npgsql preview feed

Author: bkoelman

nuget.config

@@ -4,6 +4,7 @@
     <clear />
     <add key="nuget.org" value="https://api.nuget.org/v3/index.json" />
     <add key="SwashbuckleMyGet" value="https://www.myget.org/F/domaindrivendev/api/v3/index.json" />
+    <add key="NpgsqlMyGet" value="https://www.myget.org/F/npgsql-vnext/api/v3/index.json" />
   </packageSources>
   <packageSourceMapping>
     <packageSource key="nuget.org">
@@ -12,5 +13,8 @@
     <packageSource key="SwashbuckleMyGet">
       <package pattern="Swashbuckle.*" />
     </packageSource>
+    <packageSource key="NpgsqlMyGet">
+      <package pattern="*" />
+    </packageSource>
   </packageSourceMapping>
 </configuration>