fix: email utils

Author: russellwheatley

FirebaseSwiftUI/FirebaseAuthSwiftUI/Sources/FirebaseAuthSwiftUI/Utils/EmailUtils.swift

@@ -1,8 +1,10 @@
+import Foundation
+
 class EmailUtils {
   static let emailRegex = ".+@([a-zA-Z0-9\\-]+\\.)+[a-zA-Z0-9]{2,63}"
 
   static func isValidEmail(_ email: String) -> Bool {
     let emailPredicate = NSPredicate(format: "SELF MATCHES %@", emailRegex)
     return emailPredicate.evaluate(with: email)
   }
-}
+}