Use PHP 7.4 for WooCommerce Blocks' `wp-env` Config (#51075)

This resolves a PHP 7.4 compatibility problem as well as updates the `wp-env` config for the Blocks tests to use 7.4 rather than the latest.

plugins/woocommerce-blocks/.wp-env.json

@@ -1,5 +1,6 @@
 {
 	"core": null,
+	"phpVersion": "7.4",
 	"plugins": [
 		"https://github.com/WP-API/Basic-Auth/archive/master.zip",
 		"https://downloads.wordpress.org/plugin/wordpress-importer.0.8.zip",

plugins/woocommerce/changelog/51075-fix-blocks-wp-env-php-version

@@ -0,0 +1,4 @@
+Significance: patch
+Type: tweak
+Comment: Just a change to the dev environment config.
+

plugins/woocommerce/src/Blocks/BlockTypes/ProductCollection.php

@@ -304,8 +304,9 @@ class ProductCollection extends AbstractBlock {
 			$p->set_attribute(
 				'data-wc-context',
 				wp_json_encode(
+					array_merge(
+						$current_context,
 						array(
-						...$current_context,
 							// The message to be announced by the screen reader when the page is loading or loaded.
 							'accessibilityLoadingMessage'  => __( 'Loading page, please wait.', 'woocommerce' ),
 							'accessibilityLoadedMessage'   => __( 'Page Loaded.', 'woocommerce' ),
@@ -313,6 +314,7 @@ class ProductCollection extends AbstractBlock {
 							// This way we avoid prefetching when the page loads.
 							'isPrefetchNextOrPreviousLink' => false,
 						),
+					),
 					JSON_HEX_TAG | JSON_HEX_APOS | JSON_HEX_QUOT | JSON_HEX_AMP
 				)
 			);