patch 9.0.0402: javascript module files are not recoginzed

Problem:    Javascript module files are not recoginzed.
Solution:   Recognize "*.jsm" files as Javascript. (Brett Holman,
            closes #11069)
diff --git a/src/testdir/test_filetype.vim b/src/testdir/test_filetype.vim
index 551602f..9d2677c 100644
--- a/src/testdir/test_filetype.vim
+++ b/src/testdir/test_filetype.vim
@@ -275,7 +275,7 @@
     \ 'jam': ['file.jpl', 'file.jpr', 'JAM-file.file', 'JAM.file', 'Prl-file.file', 'Prl.file'],
     \ 'java': ['file.java', 'file.jav'],
     \ 'javacc': ['file.jj', 'file.jjt'],
-    \ 'javascript': ['file.js', 'file.javascript', 'file.es', 'file.mjs', 'file.cjs'],
+    \ 'javascript': ['file.js', 'file.jsm', 'file.javascript', 'file.es', 'file.mjs', 'file.cjs'],
     \ 'javascript.glimmer': ['file.gjs'],
     \ 'javascriptreact': ['file.jsx'],
     \ 'jess': ['file.clp'],
diff --git a/src/version.c b/src/version.c
index 3d6a344..c06a43c 100644
--- a/src/version.c
+++ b/src/version.c
@@ -704,6 +704,8 @@
 static int included_patches[] =
 {   /* Add new patch number below this line */
 /**/
+    402,
+/**/
     401,
 /**/
     400,