vim-patch:partial:9.1.1668: items() does not work for Blobs

Problem:  items() does not work for Blobs
Solution: Extend items() to support Blob
          (Yegappan Lakshmanan).

closes: vim/vim#18080

da34f84847

Co-authored-by: Yegappan Lakshmanan <yegappan@yahoo.com>

src/nvim/eval.lua

@@ -6044,7 +6044,7 @@ M.funcs = {
       Return a |List| with all key/index and value pairs of {expr}.
       Each |List| item is a list with two items:
       - for a |Dict|: the key and the value
-      - for a |List| or |String|: the index and the value
+      - for a |List|, |Blob| or |String|: the index and the value
       The returned |List| is in arbitrary order for a |Dict|,
       otherwise it's in ascending order of the index.
 
@@ -6057,6 +6057,7 @@ M.funcs = {
       	endfor
       	echo items([1, 2, 3])
       	echo items("foobar")
+      	echo items(0z0102)
       <
     ]=],
     name = 'items',