patch 8.1.0193: terminal debugger buttons don't always work

Problem:    Terminal debugger buttons don't always work. (Dominique Pelle)
Solution:   Set 'cpo' to its default value.
diff --git a/src/version.c b/src/version.c
index cb2744d..3c9676e 100644
--- a/src/version.c
+++ b/src/version.c
@@ -790,6 +790,8 @@
 static int included_patches[] =
 {   /* Add new patch number below this line */
 /**/
+    193,
+/**/
     192,
 /**/
     191,