patch 8.2.0968: no proper testing of the 'cpoptions' flags

Problem:    No proper testing of the 'cpoptions' flags.
Solution:   Add tests. (Yegappan Lakshmanan, closes #6251)
diff --git a/src/version.c b/src/version.c
index dcf1746..fa44d04 100644
--- a/src/version.c
+++ b/src/version.c
@@ -755,6 +755,8 @@
 static int included_patches[] =
 {   /* Add new patch number below this line */
 /**/
+    968,
+/**/
     967,
 /**/
     966,