Cost Matrix function

[davibarreira]

This PR is the separate PR for the cost matrix function, which would be a helper function in order to make writing functions as sinkhorndivergence(c, mu, nu) where c is a function.

[coveralls]

Pull Request Test Coverage Report for Build 931149182

• 11 of 12 (91.67%) changed or added relevant lines in 1 file are covered.
• No unchanged relevant lines lost coverage.
• Overall coverage decreased (-0.07%) to 94.6%

---

Changes Missing Coverage	Covered Lines	Changed/Added Lines	%
src/utils.jl	11	12	91.67%
<!--	Total:	11	12	91.67%	-->

Totals
Change from base Build 928044156:	-0.07%
Covered Lines:	473
Relevant Lines:	500

---

💛 - Coveralls

[davibarreira]

It seems that this helper function was not necessary, so I'm closing this PR.

[coveralls]

Pull Request Test Coverage Report for Build 931101555

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

• 11 of 12 (91.67%) changed or added relevant lines in 1 file are covered.
• No unchanged relevant lines lost coverage.
• Overall coverage decreased (-0.07%) to 94.6%

---

Changes Missing Coverage	Covered Lines	Changed/Added Lines	%
src/utils.jl	11	12	91.67%
<!--	Total:	11	12	91.67%	-->

Totals
Change from base Build 928044156:	-0.07%
Covered Lines:	473
Relevant Lines:	500

---

💛 - Coveralls