FPNTextField.swift is missing an `import libPhoneNumber`

[golan-onestep]

Describe the bug
Build errors in FPNTextField.swift Lines 33-35:
Cannot find NBPhoneNumberUtil in scope
Cannot find NBAsYouTypeFormatter in scope

To Reproduce
Steps to reproduce the behavior:

1. Add FlagPhoneNumber to an Xcode project via SPM
2. Build project
3. See error

Expected behavior
Expect the project to build successfully

Screenshots

Smartphone (please complete the following information):

• Device: iPhone 16 Simulator
• OS: iOS18.0
• Version 0

FlagPhoneNumber (please complete the following information):

• Version 0.9.0

Additional context
Fix suggestion: Add import libPhoneNumber to FPNTextField.swift

[pascalguizard]

Need to do a fork to fix it... :(