beforeBreadcrumb was not adding the mutated breadcrumb

[marandaneto]

📜 Description

beforeBreadcrumb was not adding the mutated breadcrumb

💡 Motivation and Context

Fix #980
Fix #977

💚 How did you test it?

📝 Checklist

• I reviewed submitted code
• I added tests to verify changes
• I updated the docs if needed
• All tests passing
• No breaking changes

🔮 Next steps

[codecov-commenter]

Codecov Report

Merging #982 (68fb0ce) into main (1998016) will decrease coverage by 1.59%.
The diff coverage is 100.00%.

@@            Coverage Diff             @@
##             main     #982      +/-   ##
==========================================
- Coverage   91.14%   89.55%   -1.60%     
==========================================
  Files           9      106      +97     
  Lines         192     3322    +3130     
==========================================
+ Hits          175     2975    +2800     
- Misses         17      347     +330     

Impacted Files	Coverage Δ
dart/lib/src/scope.dart	95.18% <100.00%> (ø)
...event_processor/deduplication_event_processor.dart	100.00% <0.00%> (ø)
dart/lib/src/isolate_error_integration.dart	91.66% <0.00%> (ø)
dart/lib/src/protocol/span_status.dart	96.49% <0.00%> (ø)
dart/lib/src/protocol/sentry_id.dart	84.61% <0.00%> (ø)
dart/lib/src/sentry_envelope.dart	100.00% <0.00%> (ø)
dart/lib/src/protocol/sentry_request.dart	98.03% <0.00%> (ø)
dart/lib/src/protocol/contexts.dart	90.15% <0.00%> (ø)
.../lib/src/http_client/sentry_http_client_error.dart	100.00% <0.00%> (ø)
...t/lib/src/sentry_attachment/sentry_attachment.dart	100.00% <0.00%> (ø)
... and 88 more

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[marandaneto]

Flutter 3.0.5 always changes that, so better to keep this change.

[brustolin]

LGTM