patch 9.0.1918: No filetype detection for Authzed filetypes

Problem:  No filetype detection for Authzed filetypes
Solution: Detect the *.zed file extension as authzed filetype

closes: #13129

Signed-off-by: Christian Brabandt <cb@256bit.org>
Co-authored-by: Matt Polzin <mpolzin@workwithopal.com>
diff --git a/src/testdir/test_filetype.vim b/src/testdir/test_filetype.vim
index 79065a0..d9fd919 100644
--- a/src/testdir/test_filetype.vim
+++ b/src/testdir/test_filetype.vim
@@ -107,6 +107,7 @@
     asterisk: ['asterisk/file.conf', 'asterisk/file.conf-file', 'some-asterisk/file.conf', 'some-asterisk/file.conf-file'],
     astro: ['file.astro'],
     atlas: ['file.atl', 'file.as'],
+    authzed: ['schema.zed'],
     autohotkey: ['file.ahk'],
     autoit: ['file.au3'],
     automake: ['GNUmakefile.am', 'makefile.am', 'Makefile.am'],
diff --git a/src/version.c b/src/version.c
index 7a42aee..1ca1842 100644
--- a/src/version.c
+++ b/src/version.c
@@ -700,6 +700,8 @@
 static int included_patches[] =
 {   /* Add new patch number below this line */
 /**/
+    1918,
+/**/
     1917,
 /**/
     1916,