Fixed local test suite by syncing MySQL and MariaDB versions from CircleCI config

[jamius19]

Goal

MySQL and MariaDB versions are not the same between .circleci/config.yml and tests/docker-compose.yaml, and as such, the local test suite fails on the master branch whereas it passes in CircleCI.

I've synced versions of MySQL and MariaDB databases so that local tests work correctly.
Please see Issue #423 for more context.

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 91.25%. Comparing base (5d2c232) to head (abb024a).
Report is 2 commits behind head on master.

Additional details and impacted files

@@           Coverage Diff           @@
##           master     #425   +/-   ##
=======================================
  Coverage   91.25%   91.25%           
=======================================
  Files         134      134           
  Lines        7755     7755           
=======================================
  Hits         7077     7077           
  Misses        509      509           
  Partials      169      169           

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[go-jet]

Thanks. Looks good.