Update eclipse-mosquitto Docker tag to v2.0.19

[renovate]

This PR contains the following updates:

Package	Update	Change
eclipse-mosquitto	patch	2.0.18 -> 2.0.19

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Configuration

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[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 91.38%. Comparing base (78a5259) to head (6d53d5e).
Report is 1 commits behind head on master.

Additional details and impacted files

@@            Coverage Diff             @@
##           master     #253      +/-   ##
==========================================
+ Coverage   91.27%   91.38%   +0.11%     
==========================================
  Files          38       38              
  Lines        1799     1799              
==========================================
+ Hits         1642     1644       +2     
+ Misses        136      135       -1     
+ Partials       21       20       -1     

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