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: I592583489212a3a7d3fc48cedac2a97489aa149b
diff --git a/src/watchdog.hpp b/src/watchdog.hpp
index 31cde63..16f05f1 100644
--- a/src/watchdog.hpp
+++ b/src/watchdog.hpp
@@ -18,7 +18,7 @@
 
 constexpr auto DEFAULT_MIN_INTERVAL_MS = 0;
 namespace Base = sdbusplus::xyz::openbmc_project::State::server;
-using WatchdogInherits = sdbusplus::server::object::object<Base::Watchdog>;
+using WatchdogInherits = sdbusplus::server::object_t<Base::Watchdog>;
 
 /** @class Watchdog
  *  @brief OpenBMC watchdog implementation.
@@ -63,7 +63,7 @@
      *  @param[in] minInterval     - minimum intervale value allowed
      *  @param[in] defaultInterval - default interval to start with
      */
-    Watchdog(sdbusplus::bus::bus& bus, const char* objPath,
+    Watchdog(sdbusplus::bus_t& bus, const char* objPath,
              const sdeventplus::Event& event,
              ActionTargetMap&& actionTargetMap = {},
              std::optional<Fallback>&& fallback = std::nullopt,
@@ -164,7 +164,7 @@
 
   private:
     /** @brief sdbusplus handle */
-    sdbusplus::bus::bus& bus;
+    sdbusplus::bus_t& bus;
 
     /** @brief Map of systemd units to be started when the timer expires */
     ActionTargetMap actionTargetMap;