Release 0.4.0

[francescovallone]

Description

Pr to prepare for release 0.4.0 of Serinus

[codecov]

Codecov Report

Attention: Patch coverage is 80.22599% with 35 lines in your changes missing coverage. Please review.

Project coverage is 87.05%. Comparing base (9d0f118) to head (a028f69).
Report is 2 commits behind head on main.

Files	Patch %	Lines
...ages/serinus/lib/src/handlers/request_handler.dart	76.92%	6 Missing ⚠️
...ckages/serinus/lib/src/http/internal_response.dart	81.81%	6 Missing ⚠️
packages/serinus/lib/src/core/hook.dart	0.00%	5 Missing ⚠️
...ages/serinus/lib/src/contexts/request_context.dart	0.00%	4 Missing ⚠️
...ackages/serinus/lib/src/http/internal_request.dart	73.33%	4 Missing ⚠️
packages/serinus/lib/src/core/application.dart	0.00%	3 Missing ⚠️
...kages/serinus/lib/src/core/application_config.dart	0.00%	2 Missing ⚠️
packages/serinus/lib/src/http/cors.dart	0.00%	2 Missing ⚠️
packages/serinus/lib/src/handlers/handler.dart	87.50%	1 Missing ⚠️
packages/serinus/lib/src/http/request.dart	83.33%	1 Missing ⚠️
... and 1 more

Additional details and impacted files

@@            Coverage Diff             @@
##             main      #26      +/-   ##
==========================================
- Coverage   87.09%   87.05%   -0.04%     
==========================================
  Files          69       65       -4     
  Lines        1921     1908      -13     
==========================================
- Hits         1673     1661      -12     
+ Misses        248      247       -1     

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