Hotfix: Cache latest versions

[dmannarino]

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• Make sure you are requesting to pull a topic/feature/bugfix branch (right side). Don't request your master!
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Pull request type

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• Bugfix
• Feature
• Code style update (formatting, renaming)
• Refactoring (no functional changes, no api changes)
• Build related changes
• Documentation content changes
• Other (please describe):

What is the current behavior?

• get_latest_version is called A LOT, and every time it's called it makes a DB call.

Issue Number: N/A

What is the new behavior?

• Cache the latest version value to reduce DB calls. Invalidate cache in new and update version functions, but set a TTL of 1 hour in case I missed something.

Does this introduce a breaking change?

• Yes
• No

Other information

[codecov-commenter]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 81.60%. Comparing base (09fc8ab) to head (38df9a5).

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Additional details and impacted files

@@           Coverage Diff           @@
##           master     #535   +/-   ##
=======================================
  Coverage   81.59%   81.60%           
=======================================
  Files         125      125           
  Lines        5619     5622    +3     
=======================================
+ Hits         4585     4588    +3     
  Misses       1034     1034           

Flag	Coverage Δ
unittests	81.60% <100.00%> (+<0.01%)	⬆️

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