patch 9.0.0602: new TypeScript extensions are not recognized

Problem:    New TypeScript extensions are not recognized.
Solution:   Recognize .mts and .cts files. (closes #11237)
diff --git a/src/version.c b/src/version.c
index 0952526..4304751 100644
--- a/src/version.c
+++ b/src/version.c
@@ -700,6 +700,8 @@
 static int included_patches[] =
 {   /* Add new patch number below this line */
 /**/
+    602,
+/**/
     601,
 /**/
     600,