loongson/mirror: links for fx-backtester

loongson/mirror fx_backtester-1.2.1.tar.gz
loongson/mirror fx_backtester-1.2.1-py3-none-any.whl
loongson/mirror fx_backtester-0.0.0.tar.gz
loongson/mirror fx_backtester-0.0.0-py3-none-any.whl