clang-format: update to latest from docs repo

The openbmc/docs/style/cpp/.clang-format has been updated to support
clang-format10, take this opportunity to update it in this repo.

Change-Id: I9e6b9853bf4cd7399b1ae504ea3be5093d763fee
Signed-off-by: Adriana Kobylak <anoo@us.ibm.com>
diff --git a/version.hpp b/version.hpp
index 5827c8a..9cf76da 100644
--- a/version.hpp
+++ b/version.hpp
@@ -4,8 +4,9 @@
 #include "xyz/openbmc_project/Object/Delete/server.hpp"
 #include "xyz/openbmc_project/Software/Version/server.hpp"
 
-#include <functional>
 #include <sdbusplus/bus.hpp>
+
+#include <functional>
 #include <string>
 
 namespace phosphor