update PTB submodule for eyetracking changes

Remi-Gau · Remi-Gau · commit 117aabc2d938 · 2020-08-11T18:40:41.000+02:00
diff --git a/lib/CPP_PTB b/lib/CPP_PTB
@@ -1 +1 @@
-Subproject commit d7a11134b5af851b5dce7f5cfa826351057b5c56
+Subproject commit 2e4500f78ae3c9620ec080f6d2838bdc63f7ef40
