patch 8.2.1885: filetype tests unnessarily creates swap files

Problem:    Filetype tests unnessarily creates swap files.
Solution:   Disable 'swapfile'. (Ken Takata, closes #7183)
diff --git a/src/version.c b/src/version.c
index 56bf8f6..0716ca1 100644
--- a/src/version.c
+++ b/src/version.c
@@ -751,6 +751,8 @@
 static int included_patches[] =
 {   /* Add new patch number below this line */
 /**/
+    1885,
+/**/
     1884,
 /**/
     1883,