loongson/pypi: links for ipywidget-pivot-table

loongson/mirror ipywidget_pivot_table-0.1.4.tar.gz
loongson/mirror ipywidget_pivot_table-0.1.3a0.tar.gz
loongson/mirror ipywidget_pivot_table-0.1.2a0.tar.gz
loongson/mirror ipywidget_pivot_table-0.1.1a0.tar.gz
loongson/mirror ipywidget_pivot_table-0.1.0a0.tar.gz