Fix issue with JobMetadata not longer supporting __setitem__ method

[VMRuiz]

Fixes #403

I did my best to test it locally, but I was not able to test it in a real Scrapy Cloud enviroment.

[codecov]

Codecov Report

Patch coverage: 100.00% and project coverage change: +1.14 🎉

Comparison is base (e697dbe) 76.37% compared to head (3c7627e) 77.52%.

Additional details and impacted files

@@            Coverage Diff             @@
##           master     #404      +/-   ##
==========================================
+ Coverage   76.37%   77.52%   +1.14%     
==========================================
  Files          73       73              
  Lines        3103     3101       -2     
  Branches      518      516       -2     
==========================================
+ Hits         2370     2404      +34     
+ Misses        663      626      -37     
- Partials       70       71       +1     

Impacted Files	Coverage Δ
spidermon/contrib/actions/jobs/tags.py	97.05% <100.00%> (+97.05%)	⬆️

... and 1 file with indirect coverage changes

☔ View full report in Codecov by Sentry.
📢 Do you have feedback about the report comment? Let us know in this issue.

[Gallaecio]

I did my best to test it locally, but I was not able to test it in a real Scrapy Cloud enviroment.

While the code looks good to me, it may be best to get a manual test on Scrapy Cloud before merging.

[VMRuiz]

I did my best to test it locally, but I was not able to test it in a real Scrapy Cloud enviroment.

While the code looks good to me, it may be best to get a manual test on Scrapy Cloud before merging.

I forgot this is a public repo 😅. I was able to test it, works as expected.