patch 8.1.0032: BS in prompt buffer starts new line

Problem:    BS in prompt buffer starts new line.
Solution:   Do not allows BS over the prompt.  Make term_sendkeys() handle
            special keys. Add a test.
diff --git a/src/version.c b/src/version.c
index 846ac70..a0aaf86 100644
--- a/src/version.c
+++ b/src/version.c
@@ -762,6 +762,8 @@
 static int included_patches[] =
 {   /* Add new patch number below this line */
 /**/
+    32,
+/**/
     31,
 /**/
     30,