patch 8.2.2437: deprecation warnings with default configuration

Problem:    Deprecation warnings with default configuration.
Solution:   Add -Wno-deprecated-declarations.
diff --git a/src/version.c b/src/version.c
index 768b3af..903f3fd 100644
--- a/src/version.c
+++ b/src/version.c
@@ -751,6 +751,8 @@
 static int included_patches[] =
 {   /* Add new patch number below this line */
 /**/
+    2437,
+/**/
     2436,
 /**/
     2435,