Feature/tar 644 add mimetype

[jonnyAmplience]

Pull request checklist

Please check if your PR fulfills the following requirements:

• Tests (npm run test) for the changes have been added (for bug fixes / features)
• Build (npm run build) was run locally and any changes were pushed
• Docs (npm run doc) have been reviewed and added / updated if needed (for bug fixes / features)
• PR title and git commit messages conform to the conventionalcommits specification

Pull request type

Please check the type of change your PR introduces:

• Bugfix
• Feature
• Code style update (formatting, renaming)
• Refactoring (no functional changes, no api changes)
• Build related changes
• Documentation content changes
• Other (please describe):

What is the current behavior?

When calling toJSON() on media types, mimeType is removed.

What is the new behavior?

When calling toJSON() on media types, mimeType is in the returned response. If mimeType is not available, it will be undefined in the response.

Does this introduce a breaking change?

• Yes
• No

Other information

[coveralls]

Pull Request Test Coverage Report for Build 12141537033

Details

• 0 of 0 changed or added relevant lines in 0 files are covered.
• No unchanged relevant lines lost coverage.
• Overall coverage remained the same at 93.307%

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Totals
Change from base Build 11596600889:	0.0%
Covered Lines:	818
Relevant Lines:	849

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💛 - Coveralls