sdbusplus: use shorter type aliases

The sdbusplus headers provide shortened aliases for many types.
Switch to using them to provide better code clarity and shorter
lines.  Possible replacements are for:
  * bus_t
  * exception_t
  * manager_t
  * match_t
  * message_t
  * object_t
  * slot_t

Signed-off-by: Patrick Williams <patrick@stwcx.xyz>
Change-Id: Ibd2a0b512bfb7caf65bfab64b271d194da520aac
diff --git a/include/ipmid/types.hpp b/include/ipmid/types.hpp
index 2fc37ff..fb94aeb 100644
--- a/include/ipmid/types.hpp
+++ b/include/ipmid/types.hpp
@@ -197,7 +197,7 @@
 using Object = sdbusplus::message::object_path;
 using ObjectMap = std::map<Object, InterfaceMap>;
 
-using IpmiUpdateData = sdbusplus::message::message;
+using IpmiUpdateData = sdbusplus::message_t;
 
 struct SelData
 {