chore: update to use current @oclif/core

[strophy]

Issue being fixed or feature implemented

@oclif/core has been released, deprecating the previously used @oclif/command, @oclif/errors and @oclif/config dependencies. We need to update in order to use new functionality such as the oclif pack command.

What was done?

Migrate to @oclif/core following the migration guide.

How Has This Been Tested?

In CI

Breaking Changes

• We now support using the space character as a topic separator, but dashmate remains backwards compatible with the : colon separator.
• Requires Node 12+

Checklist:

• I have performed a self-review of my own code
• I have commented my code, particularly in hard-to-understand areas
• I have added or updated relevant unit/integration/functional/e2e tests
• I have made corresponding changes to the documentation

For repository code-owners and collaborators only

• I have assigned this pull request to a milestone

[shumkov]

@strophy why so many dependency updates?

[strophy]

@strophy why so many dependency updates?

Probably because I changed the package.json file, which resulted in a lot of dependency updates? Or did I do something incorrectly here, should I commit the zip files or not?

[shumkov]

@strophy Yep, you should.

[shumkov]

Good job! 👍