[Chore] Upgrade Strapi to v4 stable version

[MattieBelt]

No description provided.

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[codecov]

Codecov Report

Merging #27 (2ab99d3) into master (522e3f1) will increase coverage by 0.15%.
The diff coverage is 100.00%.

@@            Coverage Diff             @@
##           master      #27      +/-   ##
==========================================
+ Coverage   98.55%   98.70%   +0.15%     
==========================================
  Files          24       29       +5     
  Lines         138      155      +17     
  Branches       24       24              
==========================================
+ Hits          136      153      +17     
  Misses          2        2              

Impacted Files	Coverage Δ
example/config/env/testing/database.js	100.00% <ø> (ø)
example/config/server.js	100.00% <ø> (ø)
example/config/middlewares.js	100.00% <100.00%> (ø)
example/src/api/category/controllers/category.js	100.00% <100.00%> (ø)
example/src/api/category/routes/category.js	100.00% <100.00%> (ø)
example/src/api/category/services/category.js	100.00% <100.00%> (ø)
example/src/api/episode/controllers/episode.js	100.00% <100.00%> (ø)
example/src/api/episode/routes/episode.js	100.00% <100.00%> (ø)
example/src/api/episode/services/epsiode.js	100.00% <100.00%> (ø)
example/src/api/person/controllers/person.js	100.00% <100.00%> (ø)
... and 5 more

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