message: Corrected returning types in crypto module python wrapper
diff: @@ -226,7 +226,7 @@ async def auth_crypt(wallet_handle: int,
  msg)
  def transform_cb(arr_ptr: POINTER(c_uint8), arr_len: c_uint32):
  - return bytes(arr_ptr[:arr_len])
  + return bytes(arr_ptr[:arr_len]),
  if not hasattr(auth_crypt, "cb"):
  logger.debug("auth_crypt: Creating callback")
  @@ -291,7 +291,7 @@ async def auth_decrypt(wallet_handle: int,
  (sender_vk, msg) = await do_call('indy_crypto_auth_decrypt',
  c_wallet_handle,
  c_recipient_vk,
  - bytes(encrypted_msg),
  + encrypted_msg,
  c_encrypted_msg_len,
  auth_decrypt.cb)
  @@ -325,7 +325,7 @@ async def anon_crypt(recipient_vk: str,
  msg)
  def transform_cb(arr_ptr: POINTER(c_uint8), arr_len: c_uint32):
  - return bytes(arr_ptr[:arr_len])
  + return bytes(arr_ptr[:arr_len]),
  if not hasattr(anon_crypt, "cb"):
  logger.debug("anon_crypt: Creating callback")
  @@ -382,7 +382,7 @@ async def anon_decrypt(wallet_handle: int,
  decrypted_message = await do_call('indy_crypto_anon_decrypt',
  c_wallet_handle,
  c_recipient_vk,
  - bytes(encrypted_msg),
  + encrypted_msg,
  c_encrypted_msg_len,
  anon_decrypt.cb)
  