patch 8.1.2056: "make test" for indent files doesn't cause make to fail

Problem:    "make test" for indent files doesn't cause make to fail.
Solution:   Exit the script with ":cquit". (Daniel Hahler, closes #4949)
diff --git a/src/version.c b/src/version.c
index 1c7ece3..50c1c4c 100644
--- a/src/version.c
+++ b/src/version.c
@@ -758,6 +758,8 @@
 static int included_patches[] =
 {   /* Add new patch number below this line */
 /**/
+    2056,
+/**/
     2055,
 /**/
     2054,