patch 8.2.1805: Unix: terminal mode changed when using ":shell"

Problem:    Unix: terminal mode changed when using ":shell".
Solution:   Avoid calling settmode() when not needed. (issue #7079)
diff --git a/src/version.c b/src/version.c
index cfd0d54..b8b9917 100644
--- a/src/version.c
+++ b/src/version.c
@@ -751,6 +751,8 @@
 static int included_patches[] =
 {   /* Add new patch number below this line */
 /**/
+    1805,
+/**/
     1804,
 /**/
     1803,