1.18.0

1.18.0

• extend camel_case_types to cover enums
• fix no_leading_underscores_for_local_identifiers to not
  mis-flag field formal parameters with default values
• fix prefer_function_declarations_over_variables to not
  mis-flag non-final fields
• performance improvements for prefer_contains
• update exhaustive_cases to skip deprecated values that
  redirect to other values