patch 8.0.0894: there is no test for runtime filetype detection

Problem:    There is no test for runtime filetype detection.
Solution:   Test a list of filetypes from patterns.
diff --git a/src/version.c b/src/version.c
index 326f33b..77e6345 100644
--- a/src/version.c
+++ b/src/version.c
@@ -770,6 +770,8 @@
 static int included_patches[] =
 {   /* Add new patch number below this line */
 /**/
+    894,
+/**/
     893,
 /**/
     892,