roots/bedrock add plugins

defaultplugins.txt

    // "wpackagist-plugin/woocommerce": "3.3.5",
    "wpackagist-plugin/media-file-renamer": "4.2.*",
    "wpackagist-plugin/better-search-replace": "^1.3.2",
    "wpackagist-plugin/what-template-file-am-i-viewing": "^1.2",
    "wpackagist-plugin/regenerate-thumbnails": "^3.0.2",
    "wpackagist-plugin/wordpress-seo":"^7.6.1",
    "wpackagist-plugin/google-analytics-for-wordpress":"^7.0.8",
    "wpackagist-plugin/kwayy-html-sitemap":"^3.1",
    "wpackagist-plugin/mainwp-child":"^3.4.7.1",
    "wpackagist-plugin/wp-time-capsule":"^1.18.0",
    "advanced-custom-fields/advanced-custom-fields-pro": "^5.6.10",
    "gravityforms/gravityforms": "2.3.2.6",
    "roots/soil": "^3.7"