Donation For WooCommerce 3.7.1

* IMPROVED - Donation causes dropdown style.
* FIXED - Donation causes not showing on custom value donation type.
* FIXED - SelectWoo error in JS

* ADDED - Edit placeholder text of other input field by using filter - "wc_donation_other_amount_placeholder", $placeholder, $min_amount, $max_amount
* ADDED - Donation Goals Feature
* ADDED - Added donation post id in parameters of action "wc_donation_before_single_add_donation" & "wc_donation_after_single_add_donation"
* IMPROVEMENT - Donation label can be empty if user donot want to show.
* FIXED - Donation single page layout fixed.
* FIXED - Donation Order Ajax issue.
* FIXED - Gutenberg Block added for campaign shortcode.

* FIXED - Place same campaign in widget & shortcode in same page.