fix: type detection of EmailServicesFunction

[scolladon]

Explain your changes

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Flag EmailServicesFunction type to be detected only via directory.
As its file extension is too broad and this type cannot be located outside its folder

Does this close any currently open issues?

---

closes #830

• Jest tests added to cover the fix.

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 100.00%. Comparing base (de4cc73) to head (31b5c58).

Additional details and impacted files

@@            Coverage Diff            @@
##              main      #831   +/-   ##
=========================================
  Coverage   100.00%   100.00%           
=========================================
  Files           37        37           
  Lines         1041      1042    +1     
  Branches       113       113           
=========================================
+ Hits          1041      1042    +1     

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[codeclimate]

Code Climate has analyzed commit 31b5c58 and detected 0 issues on this pull request.

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[scolladon]

Hi @Enszula @bhushanpuri1991 @Sero030 !

Could you help with the QA of this PR please ?
It attempts to fix the issue with EmailServicesFunction type detection.
You can try locally following those steps

Help will be very much appreciated here :)
I'll merge it and ship a new release as soon as it is validated

[github-actions]

Shipped in release v5.38.3.
You can install the new version using the version number or the latest-rc channel

$ sfdx plugins:install sfdx-git-delta@latest-rc
$ sfdx plugins:install sfdx-git-delta@v5.38.3

Happy incremental deployment!