feat(cli): enumerate relations in openapispec relation object

[aaqilniz]

This PR will restrict the relations in openapi spec by using enum.

Signed-off-by: Muhammad Aaqil aaqilniz@yahoo.com

Checklist

• DCO (Developer Certificate of Origin) signed in all commits
• npm test passes on your machine
• New tests added or existing tests modified to cover all changes
• Code conforms with the style guide
• API Documentation in code was updated
• Documentation in /docs/site was updated
• Affected artifact templates in packages/cli were updated
• Affected example projects in examples/* were updated

[coveralls]

Pull Request Test Coverage Report for Build 3620840254

Warning: This coverage report may be inaccurate.

This pull request's base commit is no longer the HEAD commit of its target branch. This means it includes changes from outside the original pull request, including, potentially, unrelated coverage changes.

• For more information on this, see Tracking coverage changes with pull request builds.
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• For a quick fix, rebase this PR at GitHub. Your next report should be accurate.

Details

• 0 of 0 changed or added relevant lines in 0 files are covered.
• No unchanged relevant lines lost coverage.
• Overall coverage increased (+0.2%) to 55.264%

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Totals
Change from base Build 3616204764:	0.2%
Covered Lines:	9520
Relevant Lines:	12285

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💛 - Coveralls

[achrinza]

LGTM 💯
Some tests would be good to prevent regression, but I'm ok to merge it as-is.

[aaqilniz]

@achrinza. I have added a test for the change. Please have a look at it.

[aaqilniz]

@achrinza All checks have successfully passed. Is the PR good to be merged?