Use std::jthread and C++17.

[stg.git] / 3rdparty / jthread

diff --git a/3rdparty/jthread b/3rdparty/jthread
new file mode 160000 (submodule)
index 0000000..0fa8d39
--- /dev/null
+++ b/3rdparty/jthread
@@ -0,0 +1 @@
+Subproject commit 0fa8d394254886c555d6faccd0a3de819b7d47f8