patch 8.2.0348: Vim9: not all code tested

Problem:    Vim9: not all code tested.
Solution:   Add a few more tests. fix using "b:" in literal dictionary.
diff --git a/src/version.c b/src/version.c
index 78d7926..d595d17 100644
--- a/src/version.c
+++ b/src/version.c
@@ -739,6 +739,8 @@
 static int included_patches[] =
 {   /* Add new patch number below this line */
 /**/
+    348,
+/**/
     347,
 /**/
     346,