patch 9.0.1907: No support for liquidsoap filetypes

Problem:  No support for liquidsoap filetypes
Solution: Add liquidsoap filetype detection code

closes: #13111

Signed-off-by: Christian Brabandt <cb@256bit.org>
Co-authored-by: Romain Beauxis <toots@rastageeks.org>
diff --git a/src/testdir/test_filetype.vim b/src/testdir/test_filetype.vim
index 9e13777..79065a0 100644
--- a/src/testdir/test_filetype.vim
+++ b/src/testdir/test_filetype.vim
@@ -372,6 +372,7 @@
     lilo: ['lilo.conf', 'lilo.conf-file'],
     lilypond: ['file.ly', 'file.ily'],
     limits: ['/etc/limits', '/etc/anylimits.conf', '/etc/anylimits.d/file.conf', '/etc/limits.conf', '/etc/limits.d/file.conf', '/etc/some-limits.conf', '/etc/some-limits.d/file.conf', 'any/etc/limits', 'any/etc/limits.conf', 'any/etc/limits.d/file.conf', 'any/etc/some-limits.conf', 'any/etc/some-limits.d/file.conf'],
+    liquidsoap: ['file.liq'],
     liquid: ['file.liquid'],
     lisp: ['file.lsp', 'file.lisp', 'file.asd', 'file.el', 'file.cl', '.emacs', '.sawfishrc', 'sbclrc', '.sbclrc'],
     lite: ['file.lite', 'file.lt'],
diff --git a/src/version.c b/src/version.c
index f517b5b..655b1d1 100644
--- a/src/version.c
+++ b/src/version.c
@@ -700,6 +700,8 @@
 static int included_patches[] =
 {   /* Add new patch number below this line */
 /**/
+    1907,
+/**/
     1906,
 /**/
     1905,