HS: sourceInfo 4/4 + arrayLiteral 8/8 (+5 tests)

- tokenizer hs-emit!: add :end (max pos, start+len(val)) and :line fields to tokens
- parser hs-parse-ast: wrap fn body in do so set! hs-span-mode executes
- runtime hs-make-object: remove _order key (V8 native insertion order sufficient)

lib/hyperscript/tokenizer.sx

@@ -460,7 +460,13 @@
         hs-emit!
         (fn
           (type value start)
-          (append! tokens (hs-make-token type value start))))
+          (let
+            ((tok (hs-make-token type value start))
+              (end-pos (max pos (+ start (if (nil? value) 0 (len (str value)))))))
+            (do
+              (dict-set! tok "end" end-pos)
+              (dict-set! tok "line" (len (split (slice src 0 start) "\n")))
+              (append! tokens tok)))))
       (define
         scan!
         (fn