patch 8.1.2140: "gk" and "gj" do not work correctly in number column

Problem:    "gk" and "gj" do not work correctly in number column.
Solution:   Allow for a negative "curswant". (Zach Wegner, closes #4969)
diff --git a/src/version.c b/src/version.c
index 87b3a33..2ddecaf 100644
--- a/src/version.c
+++ b/src/version.c
@@ -754,6 +754,8 @@
 static int included_patches[] =
 {   /* Add new patch number below this line */
 /**/
+    2140,
+/**/
     2139,
 /**/
     2138,