Add a set of integration tests which use In Memory SQLite databases.

[TrevorPilley]

[pleb]

I would be interested in helping with the integration testing.

Here's what I've set up for PetaPoco. Thoughts?

Docker for (MySQL, Postgres)

• https://github.com/CollaboratingPlatypus/PetaPoco/tree/development/PetaPoco.Tests.Docker

Initial integration testing for all PP supported DBs.

• https://github.com/CollaboratingPlatypus/PetaPoco/tree/development/PetaPoco.Tests.Integration

The only install requirements are

• Docker for windows
• MsSQL Express