Trivia True-False App

Code related to the quiz-game repo, but leveled up.
Most notable changes I've made:

• I created the Graphical User Interface as a class called QuizInterface, with its attributes (window, widgets) from tkinter package and the methods needed;
• The question_data list is no longer hardcoded, but the questions are fetched by a request to the trivia API (Open Trivia Database);
  • giving as parameters the number of questions, category and type.
• Apart from that, I've made the necessary adjustments to make the project work after implementing the changes.