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: Ie530f2c63000bbfac7c5fbbc74ebe6bc8c07fb1a
diff --git a/src/item_updater.cpp b/src/item_updater.cpp
index 5481b06..1b38e13 100644
--- a/src/item_updater.cpp
+++ b/src/item_updater.cpp
@@ -29,7 +29,7 @@
 using SVersion = server::Version;
 using VersionPurpose = SVersion::VersionPurpose;
 
-void ItemUpdater::createActivation(sdbusplus::message::message& m)
+void ItemUpdater::createActivation(sdbusplus::message_t& m)
 {
     sdbusplus::message::object_path objPath;
     std::map<std::string, std::map<std::string, std::variant<std::string>>>
@@ -306,7 +306,7 @@
     return version;
 }
 
-void ItemUpdater::onPsuInventoryChangedMsg(sdbusplus::message::message& msg)
+void ItemUpdater::onPsuInventoryChangedMsg(sdbusplus::message_t& msg)
 {
     using Interface = std::string;
     Interface interface;