Extend jaeger results

[aksdb]

The previous implementation had one problem and two shortcomings I hope to have fixed with this PR:

1. In the error case, "200" was stored as http.status_code. I now call c.Error(err) to properly populate the status code.
2. The error message was not added to the span. This is now done, even with special support for echo.HTTPError so its message can be easily tracked.
3. The componentName was private and could not be changed. It is public now.

Only downside: I had to increase the required Go version to 1.13, since I use error-unwrapping.

[aksdb]

This should fix #32.

[codecov]

Codecov Report

Merging #47 (5795e46) into master (4026d23) will increase coverage by 1.20%.
The diff coverage is 100.00%.

@@            Coverage Diff             @@
##           master      #47      +/-   ##
==========================================
+ Coverage   54.42%   55.62%   +1.20%     
==========================================
  Files           8        8              
  Lines         441      453      +12     
==========================================
+ Hits          240      252      +12     
  Misses        182      182              
  Partials       19       19              

Impacted Files	Coverage Δ
jaegertracing/jaegertracing.go	46.77% <100.00%> (+5.70%)	⬆️

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