I think you don't support Npgsql v3. After update my nuget package in my project with 3.0.4, I have an error :
Couldn't load 'NpgsqlTypes.NpgsqlTimeZone' in assembly 'Npgsql, Version=18.104.22.168, Culture=neutral, PublicKeyToken=5d8b90d52f46fda7'
Have you plan to support this new branch ? Because v2 is going to be deprecated and I think I am not the first (and the last) I update my nuget package without remark this break.
Thanks in advance
PS : A support of v3.1 could be a first step for .NetCore compatibility of DataAccess, it could be nice ;)