Depend on EF 6.2.0

Author: roji

src/EntityFramework6.Npgsql/EntityFramework6.Npgsql.csproj

@@ -40,6 +40,6 @@
   </ItemGroup>
   <ItemGroup>
     <PackageReference Include="Npgsql" Version="3.2.5" />
-    <PackageReference Include="EntityFramework" Version="6.1.3" />
+    <PackageReference Include="EntityFramework" Version="6.2.0" />
   </ItemGroup>
 </Project>