chore(deps): update dependency flutter_lints to v2

[renovate[bot]]

This PR contains the following updates:

Package	Type	Update	Change
flutter_lints	dev_dependencies	major	^1.0.3 -> ^2.0.0

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Release Notes

flutter/packages

### [`v2.0.1`](https://togithub.com/flutter/packages/blob/HEAD/packages/flutter_lints/CHANGELOG.md#​201) [Compare Source](https://togithub.com/flutter/packages/compare/flutter_lints-v2.0.0...flutter_lints-v2.0.1) - Updated readme to document suggestion process for new lints ### [`v2.0.0`](https://togithub.com/flutter/packages/blob/HEAD/packages/flutter_lints/CHANGELOG.md#​200) [Compare Source](https://togithub.com/flutter/packages/compare/flutter_lints-v1.0.4...flutter_lints-v2.0.0) - Added the following lints: - `sort_child_properties_last` - `use_build_context_synchronously` - Updated `package:lints` dependency to version 2.0.0, which added the following lints: - `depend_on_referenced_packages` - `library_private_types_in_public_api` - `no_leading_underscores_for_library_prefixes` - `no_leading_underscores_for_local_identifiers` - `null_check_on_nullable_type_parameter` - `prefer_interpolation_to_compose_strings` - `unnecessary_constructor_name` - `unnecessary_late` - `unnecessary_null_aware_assignments` - `unnecessary_nullable_for_final_variable_declarations` - Bumped the minimum required Dart SDK version to 2.17

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