Update dugite-extra, remove --ignore-engines

[msujew]

What it does

I've pushed an update to dugite-extra which removes the node version constraint. This change makes use of the updated version and removes --ignore-engines where it is no longer needed.

How to test

1. Build the application on a node version > 12.
2. Assert that Yarn does not show an error when running without the --ignore-engines argument
3. (optionally) Test the functionality of the @theia/git extension manually, tests should pass as well (CI is green)

Review checklist

• As an author, I have thoroughly tested my changes and carefully followed the review guidelines

Reminder for reviewers

• As a reviewer, I agree to behave in accordance with the review guidelines

[vince-fugnitto]

I've opened two IP Due Diligence issues related to the new dependencies:

• [email protected]
• [email protected]

[vince-fugnitto]

The changes look good to me 👍, I confirmed that the following works:

• building with a newer version of node works, and no flag is needed
• basic git functionality seems to work fine with the updates
• the IP Due Diligence issues are approved and the license check