Changes to use typeorm version 0.3.x

[gustavo-dev-commit]

Description

Changes to use typeorm version 0.3.x

• Removal of obsolete functions
• Change to use DataSource
• Creating a new parameter to force the type of entity used
• Creation of the useConnection method to define the DataSource in the Container

Checklist

• the pull request title describes what this PR does (not a vague title like Update index.md)
• the pull request targets the default branch of the repository (develop)
• the code follows the established code style of the repository
  • npm run prettier:check passes
  • npm run lint:check passes
• tests are added for the changes I made (if any source code was modified)
• documentation added or updated
• I have run the project locally and verified that there are no errors

Fixes

fixes #66

[jagan]

Thanks for working on this! I was waiting for this update! Hope it gets merged soon!

[VivekFitkariwala]

Thanks for working on this PR. Any timeline for when this PR is going to get merged?

[ppratikcr7]

@slavafomin @pleerock @NoNameProvided Thanks for this much needed PR. We are also waiting for this PR to be merged. Any idea, by when the last subtask would be done?

[danielfarah54]

Any updates on when this PR gonna be merged?

[ppratikcr7]

Any update?