3.8 fix mypy

README.md

@@ -398,6 +398,7 @@ factory.load(1, int)  # prints: parsing done
 * `Optional`
 * `Any`, using this type no conversion is done during parsing. But serialization is based on real data type
 * `Union`
+* `Literal` types, including variant from `typing_exstensions`
 * `dataclass` 
 * `Generic` dataclasses 
 * `datetime` and `UUID` can be converted using predefind schemas

tests/test_literal.py

@@ -6,7 +6,7 @@
 
 from dataclass_factory import Factory
 
-LITERALS = [CompatLiteral]
+LITERALS: Any = [CompatLiteral]
 if sys.version_info >= (3, 8):
     from typing import Literal as PyLiteral