refactor: updated sdk constraints and removed warnings

[bryansantosdeve]

refactor: updated sdk constraints and removed warnings

[codecov]

Codecov Report

Merging #138 (8fb6baf) into master (6c46a17) will not change coverage.
The diff coverage is n/a.

❗ Current head 8fb6baf differs from pull request most recent head 06ec42d. Consider uploading reports for the commit 06ec42d to get more accurate results

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  Hits           197       197           

[bryansantosdeve]

Changes on pubspec.yaml and analysis_options.yaml :

• SDK constraints updated from ">=2.12.0 <3.0.0" to ">=2.16.0 <3.0.0".
• Due to SDK >=3.0.0 on constraints and some imcompatibilities with lint package, it required to override the "analyze" options with strong-mode. Since lint upgraded to v2.1.0, the implicit-casts option was removed. The same point was discussed on this issue. In this case, update the project totally to Dart3 could be adequate to current scenario of packages available on community.

If there are any points in mind, please, let me know!