Welcart Nova 1.1.15 をリリース

style.css 推奨環境の修正

コメント修正：　welcart_basic-nova/style.css 11行目あたり

/*
Theme Name:     Welcart Nova
Description:        Welcart Nova is child theme for Welcart Basic.
Author:         Collne.Inc
Author URI:     http://www.collne.com/
Template:       welcart_basic
Version:        1.1.15
License:        GNU General Public License v2 or later
License URI:        http://www.gnu.org/licenses/gpl-2.0.html
Tags:           responsive-layout, nova, two-columns, right-sidebar. left-sidebar
Requires at least:  5.6
Requires PHP:       7.0 - 7.4
*/