Set Tryton classifier

issue2134

setup.py

@@ -38,6 +38,7 @@ setup(name='trytond_account_invoice_history',
     classifiers=[
         'Development Status :: 5 - Production/Stable',
         'Environment :: Plugins',
+        'Framework :: Tryton',
         'Intended Audience :: Developers',
         'Intended Audience :: Financial and Insurance Industry',
         'Intended Audience :: Legal Industry',