Tower of Hanoi through recursion

[eric774]

Describe your change:

• [ Yes] Add an algorithm?
• Fix a bug or typo in an existing algorithm?
• Documentation change?

Checklist:

• [ yes] I have read CONTRIBUTING.md.
• This pull request is all my own work -- I have not plagiarized.
• [ yes] I know that pull requests will not be merged if they fail the automated tests.
• [ yes] This PR only changes one algorithm file. To ease review, please open separate PRs for separate algorithms.
• [ yes] All new Python files are placed inside an existing directory.
• [ yes] All filenames are in all lowercase characters with no spaces or dashes.
• [ yes] All functions and variable names follow Python naming conventions.
• [ yes] All function parameters and return values are annotated with Python type hints.
• All functions have doctests that pass the automated testing.
• All new algorithms have a URL in its comments that points to Wikipedia or other similar explanation.
• If this pull request resolves one or more open issues then the commit message contains Fixes: #{$ISSUE_NO}.

[TravisBuddy]

Travis tests have failed

Hey @eric774,
Please read the following log in order to understand the failure reason.
It'll be awesome if you fix what's wrong and commit the changes.

TravisBuddy Request Identifier: 3e996930-097f-11eb-b9d6-41d4da7e5060

[eric774]

I am quite new to pull request in GitHub. Can't understand the error I am facing. Please guide me through it.