refactor: better typing

dataclass replacing dict

src/epub2go/crawl.py

@@ -6,15 +6,14 @@ from bs4 import ResultSet
 import os
 from urllib.parse import urljoin
 
-from convert import GBConvert, allbooks_url, get_all_books
+from convert import GBConvert, allbooks_url, get_all_books, Book
 
 def main():
     books = get_all_books()
     # NOTE consider making this a map()
     for book in tqdm(books):
-        book_url = book['url']
-        if book_url is not None:
-            GBConvert(book_url).run()
+        if book.url is not None:
+            GBConvert(book.url).run()
 
 
 if __name__ == "__main__":