Add support for `doctrine/dbal` version `^3.0`

[MorganGonzales]

Feature/Issue Description

Supports the latest version of doctrine/dbal to ^3.0. This will unblock apps that uses this library to make database column modifications with double data types.

Supporting Resources

• Slack

---

Summary of changes

• Simply added ^3.0 on the doctrine/dbal version in the composer.json file.

Checklist

• [] I have added unit tests for this feature/change
• [x] I have performed thorough manual testing
• [ ] I have added OpenAPI documentation (for any API changes)
• [] I verified that my code complies with GRIP code standards
• [ ] I have included method and argument descriptions (where applicable)

What's been tested

• Executed unit test on the entire app/package, making sure no functionalities were affected.

Deployment/Release notes

• No config changes or migrations are needed.

Blockers

Are there any blockers for this pull request?

• None

[ababkov]

Approved, but i still have questions about why we're setting defaults at the database level.

[MorganGonzales]

Approved, but i still have questions about why we're setting defaults at the database level.

Will discuss the implementation of where to put defaults in our meeting this afternoon. Slack convesation