pdfdocument: per dumppdf.py, get_dest accepts either bytes or str

pdfminer/pdfdocument.py

@@ -2,8 +2,8 @@
 import re
 import struct
 from hashlib import sha256, md5
-from typing import (Any, Dict, Iterable, Iterator, KeysView, List, Optional,
-                    Sequence, Tuple, Type, cast)
+from typing import (Any, AnyStr, Dict, Iterable, Iterator, KeysView, List,
+                    Optional, Sequence, Tuple, Type, Union, cast)
 
 from cryptography.hazmat.backends import default_backend
 from cryptography.hazmat.primitives.ciphers import Cipher, algorithms, modes
@@ -773,7 +773,7 @@ def search(entry: Any, level: int
             return
         return search(self.catalog['Outlines'], 0)
 
-    def lookup_name(self, cat: str, key: str) -> Any:
+    def lookup_name(self, cat: str, key: Union[str, bytes]) -> Any:
         try:
             names = dict_value(self.catalog['Names'])
         except (PDFTypeError, KeyError):
@@ -798,7 +798,7 @@ def lookup(d: Dict[str, Any]) -> Any:
             raise KeyError((cat, key))
         return lookup(d0)
 
-    def get_dest(self, name: str) -> Any:
+    def get_dest(self, name: Union[str, bytes]) -> Any:
         try:
             # PDF-1.2 or later
             obj = self.lookup_name('Dests', name)