conversations: adapt to new API

Change-Id: Ie828dbaa873fd190a88124e45a36d98b2b6c7776
diff --git a/CMakeLists.txt b/CMakeLists.txt
index 5e9d4a8..d6c4418 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -22,7 +22,7 @@
 MESSAGE("Building Ring version - " ${RING_VERSION_NAME} " " ${RING_VERSION})
 SET(PROJ_COPYRIGHT " © 2015-2019 Savoir-faire Linux \n GPLv3 https://www.gnu.org/copyleft/gpl.html")
 
-SET(CMAKE_CXX_STANDARD 14)
+SET(CMAKE_CXX_STANDARD 17)
 
 ADD_DEFINITIONS("-stdlib=libc++ -fobjc-arc")