Version 1.7.0

The version includes a lot of improvements on render_table, especially for the table actions.

• Add a custom_actions parameter for the render_table macro. When passing a list of tuples [(title, bootstrap icon, link)] to the custom_actions parameter, the render_table macro will create an icon (link) on the action column for each tuple in the list. The title text (first index of each tuple) will show when hovering over each custom_actions button. #134
• Update Bootstrap Icons to v1.5.0.
• Improve action icons for render_table, now the icons can be styled with the action-icon class. #137
• Change the default action_pk_placeholder to ':id'. The support to the old value will be removed in version 2.0. #138