object: rename object.Object to object.new for consistency.

* std/object.lua (Object): Rename from this...
(new): ...to this. Adjust all callers.
* specs/object_spec.yaml: Adjust.
* NEWS: Update.

Signed-off-by: Gary V. Vaughan <gary@gnu.org>
NEWS: fix poor grammar in set to object entry.

* NEWS: Fix poor grammar in set to object entry.

Signed-off-by: Gary V. Vaughan <gary@gnu.org>