Made class Str subclass from str

Author: BabyEntchen

string_py/string_py.py

@@ -89,7 +89,7 @@ async def aio_slow(self, args: str, speed: float = 0.1, force: bool = False, err
                 await aio_sleep(speed)
 
 
-class Str:
+class Str(str):
     """Functions to work with strings
 
     Parameters