Change lua version to 5.3

[mkslanc]

Issue #, if available: #4571

Description of changes:

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[codecov]

Codecov Report

Base: 85.99% // Head: 85.99% // No change to project coverage 👍

Coverage data is based on head (d632aae) compared to base (0d86f93).
Patch has no changes to coverable lines.

Additional details and impacted files

@@           Coverage Diff           @@
##           master    #4954   +/-   ##
=======================================
  Coverage   85.99%   85.99%           
=======================================
  Files         544      544           
  Lines       41469    41469           
  Branches     6554     6554           
=======================================
  Hits        35663    35663           
  Misses       5806     5806           

Flag	Coverage Δ
unittests	85.99% <ø> (ø)

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