fix: fix config import breaking on windows

[ephys]

Pull Request check-list

• Does npm run test pass with this change (including linting)?
• Does the description below contain a link to an existing issue (Closes #[issue]) or a description of the issue you are solving?
• Have you added new tests to prevent regressions? Can't as we don't test on windows
• Is a documentation update included (if this change modifies existing APIs, or introduces new ones)?

Description of change

#987 introduced a bug that caused sequelize-cli to be unusable on windows, as it tries to import the config file using import() instead of require(). Unlike require, import expects the path to be a valid URL.

Closes #994

[WikiRik]

Is there some way we can add a regression test for this?

[ephys]

I wish, but unless we start testing on windows, even trying to replicate a windows path will not work :/

[WikiRik]

Then we'll just have to accept this for now