refactor(utils): update template outlets from object to enum

[Mister-Hope]

BREAKING CHANGE: TEMPLATE_RENDERER_OUTLETS has been replaced with TemplateRendererOutlet

[coveralls]

Pull Request Test Coverage Report for Build 15973923102

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.
• To avoid this issue with future PRs, see these Recommended CI Configurations.
• For a quick fix, rebase this PR at GitHub. Your next report should be accurate.

Details

• 10 of 10 (100.0%) changed or added relevant lines in 1 file are covered.
• No unchanged relevant lines lost coverage.
• Overall coverage increased (+0.2%) to 72.401%

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Totals
Change from base Build 14905334983:	0.2%
Covered Lines:	656
Relevant Lines:	911

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💛 - Coveralls