fix: Inject.get should return instance.

[jacobaraujo7]

Description

Fix: Inject.get should return instance.

Checklist

• The title of my PR starts with a Conventional Commit prefix (fix:, feat:, docs: etc).
• I have read the Contributor Guide and followed the process outlined for submitting PRs.
• I have updated/added tests for ALL new/updated/fixed functionality.
• I have updated/added relevant documentation in docs and added dartdoc comments with ///.
• I have updated/added relevant examples in examples.

Breaking Change

• Yes, this is a breaking change.
• No, this is not a breaking change.

Related Issues

[codecov]

Codecov Report

Merging #709 (65d8490) into master (57413a5) will not change coverage.
The diff coverage is 100.00%.

@@            Coverage Diff            @@
##            master      #709   +/-   ##
=========================================
  Coverage   100.00%   100.00%           
=========================================
  Files           32        32           
  Lines          774       767    -7     
=========================================
- Hits           774       767    -7     

Impacted Files	Coverage Δ
flutter_modular/lib/flutter_modular.dart	100.00% <100.00%> (ø)
...dular/lib/src/presenter/widgets/widget_module.dart	100.00% <100.00%> (ø)

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[AlvaroVasconcelos]

LGMT