patch 8.1.0071: terminal debugger only works with the terminal feature

Problem:    Terminal debugger only works with the terminal feature.
Solution:   Make it also work with a prompt buffer.  Makes it possible to use
            on MS-Windows. Various other improvements. (closes #3012)
diff --git a/src/version.c b/src/version.c
index 6a294f7..366e845 100644
--- a/src/version.c
+++ b/src/version.c
@@ -762,6 +762,8 @@
 static int included_patches[] =
 {   /* Add new patch number below this line */
 /**/
+    71,
+/**/
     70,
 /**/
     69,