patch 8.0.0958: terminal test fails on Windows when winpty dll is missing

Problem:    The terminal test fails on MS-Windows when compiled with the
            terminal feature but the winpty DLL is missing.
Solution:   Check if the terminal feature works. (Ken Takata)
diff --git a/src/version.c b/src/version.c
index 9d12b1e..903b13e 100644
--- a/src/version.c
+++ b/src/version.c
@@ -770,6 +770,8 @@
 static int included_patches[] =
 {   /* Add new patch number below this line */
 /**/
+    958,
+/**/
     957,
 /**/
     956,