Data race runtime issue + Capture of 'buffer' with non-sendable type Warning

[aiFigueiredo]

New Issue Checklist

• Updated PhoneNumberKit to the latest version
• Phone number formatted correctly on JavaScript version
• I searched for existing GitHub issues
• I am aware that this library is not responsible of adding/removing/changing phone number formats and any request should be done at libphonenumber repo

Steps to reproduce

The following code in a concurrent background thread produces a data race when the Thread Sanitizer is enabled:

struct ContactData {
    let number: [String]
}

let utility = PhoneNumberUtility()
let dataArray: [ContactData] = [...]

for item in dataArray {
    utility.parse(item.numbers)
}

Expected result

No warning, nor data race.

Actual result

1. There is a data race accessing the hasError property:
   

Data race in closure #1 @Sendable (Swift.Int) -> () in closure #1 (inout Swift.UnsafeMutableBufferPointer<PhoneNumberKit.PhoneNumber>, inout Swift.Int) -> () in PhoneNumberKit.ParseManager.parseMultiple(_: Swift.Array<Swift.String>, withRegion: Swift.String, ignoreType: Swift.Bool, shouldReturnFailedEmptyNumbers: Swift.Bool) -> Swift.Array<PhoneNumberKit.PhoneNumber>

2, Opening the Project in Xcode 16.1 on master, shows a warning on line 112:

Capture of 'buffer' with non-sendable type 'UnsafeMutableBufferPointer<PhoneNumber>' in a `@Sendable` closure; this is an error in the Swift 6 language mode

Environment

Xcode 16.1 + SPM (v4.0.1 / master)