Triangle Centers

[alex-buchanan]

Describe your change:

Provide a Way of Calculating Different Triangle Centers

• [X] Add an algorithm?
• [ ] Fix a bug or typo in an existing algorithm?
• [ ] Add or change doctests? -- Note: Please avoid changing both code and tests in a single pull request.
• [ ] Documentation change?

Checklist:

• [ X ] I have read CONTRIBUTING.md.
• [ X ] This pull request is all my own work -- I have not plagiarized.
• [ X ] I know that pull requests will not be merged if they fail the automated tests.
• [ X ] This PR only changes one algorithm file. To ease review, please open separate PRs for separate algorithms.
• [ X ] All new Python files are placed inside an existing directory.
• [ X ] All filenames are in all lowercase characters with no spaces or dashes.
• [ X ] All functions and variable names follow Python naming conventions.
• [ X ] All function parameters and return values are annotated with Python type hints.
• [ X ] All functions have doctests that pass the automated testing.
• [ X ] All new algorithms include at least one URL that points to Wikipedia or another similar explanation.
• [ ] If this pull request resolves one or more open issues then the description above includes the issue number(s) with a closing keyword: "Fixes #ISSUE-NUMBER".

[alex-buchanan]

I'm not sure why pytest fails in the automated check, if the reviewer has any suggestions or requests on how to clear this test it would be much appreciated.

[alex-buchanan]

Reviewers: Is anything still missing here? The automated tests are all passing, just waiting on a reviewer to check it off / out. Anything I can do to help?