loongson/pypi: links for dash-event-callback

loongson/mirror dash_event_callback-1.2.0.tar.gz
loongson/mirror dash_event_callback-1.2.0-py3-none-any.whl
loongson/mirror dash_event_callback-1.0.2.tar.gz
loongson/mirror dash_event_callback-1.0.2-py3-none-any.whl
loongson/mirror dash_event_callback-1.0.0.tar.gz
loongson/mirror dash_event_callback-1.0.0-py3-none-any.whl