Address Issue #74 - [DOC] add typings to functions

[michael-linnane-lrn]

Problem Statement

Open Issues this addresses: https://github.com/Learnosity/learnosity-sdk-python/issues/74
The functions used in this package do not have any type hints included. This PR addresses that.

PR Actions

closes #74

What was done

• Added type and return hints to all functions
• Added new unit tests for daatapi.py to improve coverage
• Fixed usage of deprecated iterritems

How was this change tested

• Ran mypy --strict learnosity_sdk to verify all type hints and issues
• Ran test suite
• Ran coverage checker
• Ran learnosity-sdk-assessment-quickstart with local build

Notes and TODOs

• There are usages of default arguments being set to {}. This is a dangerous action and should be addressed in another PR

• Tests added
• All testsuites passed
• make dist completed successfully

[ferdia-sopermaccafraidh-lrn]

👏 praise: Nice work! 🚀 Be great to finally have full typing!

👏 praise: Great and clear PR description as well! Really helped with context for reviewing!

🎯 suggestion (non-blocking): maybe if there's an appetite for this we can add mypy --strict to the pipeline to ensure we maintain our current typing after all this effort! This could maybe be a follow up PR if the mainters are happy?

[shtrom]

Looking good! Couple of notes on the release process and Codacy warnings.

[ferdia-sopermaccafraidh-lrn]

🚢 🦜

[ferdia-sopermaccafraidh-lrn]

🚀