patch 9.0.1978: No filetype detection for just files

Problem:  No filetype detection for just files
Solution: Detect just files (*.just, justfile, etc)

closes: #13271

Signed-off-by: Christian Brabandt <cb@256bit.org>
Co-authored-by: dundargoc <gocdundar@gmail.com>
diff --git a/src/testdir/test_filetype.vim b/src/testdir/test_filetype.vim
index d9fd919..2571011 100644
--- a/src/testdir/test_filetype.vim
+++ b/src/testdir/test_filetype.vim
@@ -350,6 +350,7 @@
     jsonnet: ['file.jsonnet', 'file.libsonnet'],
     jsp: ['file.jsp'],
     julia: ['file.jl'],
+    just: ['justfile', 'Justfile', '.justfile', 'config.just'],
     kconfig: ['Kconfig', 'Kconfig.debug', 'Kconfig.file'],
     kdl: ['file.kdl'],
     kivy: ['file.kv'],
diff --git a/src/version.c b/src/version.c
index 4d037b4..2c99b23 100644
--- a/src/version.c
+++ b/src/version.c
@@ -705,6 +705,8 @@
 static int included_patches[] =
 {   /* Add new patch number below this line */
 /**/
+    1978,
+/**/
     1977,
 /**/
     1976,