patch 9.0.0942: Workflow Description Language files are not recognized

Problem:    Workflow Description Language files are not recognized.
Solution:   Add a pattern for the "wdl" filetype. (Matt Dunford,
            closes #11611)
diff --git a/src/testdir/test_filetype.vim b/src/testdir/test_filetype.vim
index 765ee89..d244736 100644
--- a/src/testdir/test_filetype.vim
+++ b/src/testdir/test_filetype.vim
@@ -623,6 +623,7 @@
     \ 'vroom': ['file.vroom'],
     \ 'vue': ['file.vue'],
     \ 'wast': ['file.wast', 'file.wat'],
+    \ 'wdl': ['file.wdl'],
     \ 'webmacro': ['file.wm'],
     \ 'wget': ['.wgetrc', 'wgetrc'],
     \ 'wget2': ['.wget2rc', 'wget2rc'],
diff --git a/src/version.c b/src/version.c
index 1568691..d86bf0a 100644
--- a/src/version.c
+++ b/src/version.c
@@ -696,6 +696,8 @@
 static int included_patches[] =
 {   /* Add new patch number below this line */
 /**/
+    942,
+/**/
     941,
 /**/
     940,