build: move from c++11 to c++17
The Khronos ecosystem is moving forward from c++11 to c++17. SPIRV-Tools
will update to C++17 soon, hence we need Shaderc to also bump.
diff --git a/CMakeLists.txt b/CMakeLists.txt
index 0232f9b..633c244 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -68,7 +68,7 @@
option(SHADERC_ENABLE_WERROR_COMPILE "Enable passing -Werror to compiler, if available" ON)
-set (CMAKE_CXX_STANDARD 11)
+set (CMAKE_CXX_STANDARD 17)
include(GNUInstallDirs)
include(cmake/setup_build.cmake)