mysqldump uses 10.3 options with pre-10.3 servers and breaks

When issuing a 10.3 mysqldump command to dump triggers and routines from a 10.2 server, the tool breaks because it tries to issue a SHOW PACKAGES command which is not supported in 10.2 and earlier releases.

mysqldump --quick --routines --triggers --no-create-info --skip-lock-tables --no-data --compress -h 10.10.16.138 -u mariadb_mock_import -p myschema

....

mysqldump: Couldn't execute 'SHOW PACKAGE STATUS WHERE Db = 'myschema'': You have an error in your SQL syntax; check the manual that corresponds to your MariaDB server version for the right syntax to use near 'PACKAGE STATUS WHERE Db = 'myschema'' at line 1 (1064)