fix: change elements equality check to overcome incorrect libs resolution

[incendial]

What is the purpose of this pull request? (put an "X" next to an item)

[ ] Documentation update
[X] Bug fix
[ ] New rule
[ ] Changes an existing rule
[ ] Add autofixing to a rule
[ ] Add a CLI option
[ ] Add something to the core
[ ] Other, please explain:

#855

[github-actions]

Dart Code Metrics unused files report of dart_code_metrics. ✅

Summary

• Scanned package folders: bin, example, lib
• No unused files found! ✅

[github-actions]

Dart Code Metrics analyze report of dart_code_metrics. ✅

Summary

• Scanned folders: bin, example, lib, test

• Total scanned files: 430

• Total lines of source code: 7569

• Total classes: 296

• Average Cyclomatic Number per line of code: 0.35

• Average Source Lines of Code per method: 6

• Total tech debt: 1326.0 hours

• Found issues: 6 ⚠

[codecov]

Codecov Report

Merging #891 (4c6c3cc) into master (75e0fb7) will decrease coverage by 0.07%.
The diff coverage is 100.00%.

❗ Current head 4c6c3cc differs from pull request most recent head 68d2607. Consider uploading reports for the commit 68d2607 to get more accurate results

@@            Coverage Diff             @@
##           master     #891      +/-   ##
==========================================
- Coverage   87.37%   87.30%   -0.08%     
==========================================
  Files         283      280       -3     
  Lines        5997     5954      -43     
==========================================
- Hits         5240     5198      -42     
+ Misses        757      756       -1     

Impacted Files	Coverage Δ
...ers/unused_code_analyzer/unused_code_analyzer.dart	98.87% <100.00%> (+0.12%)	⬆️
...ules_list/prefer_extracting_callbacks/visitor.dart	100.00% <0.00%> (ø)
...ist/prefer_extracting_callbacks/config_parser.dart	100.00% <0.00%> (ø)
...ng_callbacks/prefer_extracting_callbacks_rule.dart	100.00% <0.00%> (ø)
...nt_analyzer/base_visitors/source_code_visitor.dart
...rules/rules_list/avoid_banned_imports/visitor.dart
...void_banned_imports/avoid_banned_imports_rule.dart
...list/avoid_banned_imports/utils/config_parser.dart
...list/source_lines_of_code/source_code_visitor.dart	100.00% <0.00%> (ø)
...c/analyzers/lint_analyzer/rules/rules_factory.dart	94.31% <0.00%> (+1.05%)	⬆️

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