jwt.decode: Set algorithms to all when None

See #346

Author: danigm

jose/jwt.py

@@ -141,6 +141,9 @@ def decode(token, key, algorithms=None, options=None, audience=None, issuer=None
 
     verify_signature = defaults.get("verify_signature", True)
 
+    if algorithms is None:
+        algorithms = ALGORITHMS.ALL
+
     try:
         payload = jws.verify(token, key, algorithms, verify=verify_signature)
     except JWSError as e: