Bump Npgsql from 4.1.2 to 4.1.3

Bumps [Npgsql](https://github.com/npgsql/npgsql) from 4.1.2 to 4.1.3.
- [Release notes](https://github.com/npgsql/npgsql/releases)
- [Commits](npgsql/npgsql@v4.1.2...v4.1.3)

Signed-off-by: dependabot-preview[bot] <support@dependabot.com>

test/FluentCommand.PostgreSQL.Tests/FluentCommand.PostgreSQL.Tests.csproj

@@ -27,7 +27,7 @@
       <IncludeAssets>runtime; build; native; contentfiles; analyzers</IncludeAssets>
     </PackageReference>
     <PackageReference Include="dbup-postgresql" Version="4.2.0" />
-    <PackageReference Include="Npgsql" Version="4.1.2" />
+    <PackageReference Include="Npgsql" Version="4.1.3" />
     <PackageReference Include="Microsoft.Extensions.Configuration.EnvironmentVariables" Version="3.1.1" />
     <PackageReference Include="Microsoft.Extensions.Configuration.Json" Version="3.1.1" />
     <PackageReference Include="Microsoft.NET.Test.Sdk" Version="16.4.0" />