Flint 2.7.0

2.7.0 (13/05/2023)

This update focuses on lint rules introduce in Dart 3.

• Add deprecated_member_use_from_same_package
• Add type_literal_in_constant_pattern
• Add unnecessary_breaks
• Add unnecessary_nullable_for_final_variable_declarations
• Remove enable_null_safety
• Remove ignored invariant_booleans
• Remove ignored prefer_equal_for_default_values