build: use Go 1.19

[favonia]

Waiting for the new release of golangci-lint

[codecov]

Codecov Report

Merging #193 (2c55fbf) into main (e089132) will decrease coverage by 0.59%.
The diff coverage is 84.61%.

@@            Coverage Diff             @@
##             main     #193      +/-   ##
==========================================
- Coverage   83.31%   82.71%   -0.60%     
==========================================
  Files          27       27              
  Lines        1576     1585       +9     
==========================================
- Hits         1313     1311       -2     
- Misses        257      266       +9     
- Partials        6        8       +2     

Flag	Coverage Δ
unittests	82.71% <84.61%> (-0.60%)	⬇️

Flags with carried forward coverage won't be shown. Click here to find out more.

Impacted Files	Coverage Δ
internal/api/domain.go	100.00% <ø> (ø)
internal/monitor/healthchecks.go	86.95% <82.85%> (-8.23%)	⬇️
internal/config/config.go	98.51% <100.00%> (ø)
internal/config/env.go	98.46% <100.00%> (-1.54%)	⬇️
internal/setter/setter.go	100.00% <100.00%> (ø)

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