patch 8.1.2142: some key mappings do not work with modifyOtherKeys

Problem:    Some key mappings do not work with modifyOtherKeys.
Solution:   Remove the Shift modifier if it is already included in the key.
diff --git a/src/version.c b/src/version.c
index c92eb26..74126d2 100644
--- a/src/version.c
+++ b/src/version.c
@@ -754,6 +754,8 @@
 static int included_patches[] =
 {   /* Add new patch number below this line */
 /**/
+    2142,
+/**/
     2141,
 /**/
     2140,