Add "Framework :: Odoo :: 16.0" classifier (#117)

The Odoo 16.0 branch has been created and it will be released in October.

Author: sbidoul

src/trove_classifiers/__init__.py

@@ -154,6 +154,7 @@
     "Framework :: Odoo :: 13.0",
     "Framework :: Odoo :: 14.0",
     "Framework :: Odoo :: 15.0",
+    "Framework :: Odoo :: 16.0",
     "Framework :: Opps",
     "Framework :: Paste",
     "Framework :: Pelican",