v4.1.0

Features:

• You can now select the keyboardType for the confirm Signup Code with [confirmSignupKeyboardType]. (Thanks @0ttik !)
• Added a [headerWidget] that can be used to provide some text above the loginCard. (Thanks @cloudonlanapps !)
• You can now perform checks between switching to additionalData (if provided) using [onSwitchToAdditionalFields] (Thanks @blanquartf !)

Bugs fixed:

• Fixed termOfService.linkUrl. (Thanks @fotiDim !)

Other improvements:

• Migrated to lint and applied all suggested lints.
• Updated dependencies.