1.38.0

• Change minimum Dart version to ^3.13 🎯
• Add lints:
  • async_return_with_no_await
  • empty_container_bodies
  • initialize_in_field_declaration
  • no_dynamic_casts
  • no_raw_types
  • unnecessary_const_in_enum_constructor
  • unnecessary_primary_constructor_body
  • unnecessary_type_name_in_constructor
  • use_declaring_parameters
  • use_primary_constructors
• Remove deprecated lints:
  • avoid_private_typedef_functions
  • one_member_abstracts
  • unnecessary_await_in_return