CartItem Product edge field "simpleAttributes" implemented and tested. (#521)

bin/_env.sh

@@ -1,3 +1,5 @@
+set +u
+
 if [[ -z "$DB_NAME" ]]; then
 	echo "DB_NAME not found"
 	print_usage_instruction
@@ -10,7 +12,7 @@ fi
 DB_HOST=${DB_HOST-localhost}
 DB_PASS=${DB_PASSWORD-""}
 WP_VERSION=${WP_VERSION-5}
-PHPUNIT_VERSION=${PHPUNIT_VERSION-8.1}
+PHPUNIT_VERSION=${PHPUNIT_VERSION-"<=8.1"}
 PROJECT_ROOT_DIR=$(pwd)
 WP_CORE_DIR=${WP_CORE_DIR:-local/public}
 PLUGINS_DIR=${PLUGINS_DIR:-"$WP_CORE_DIR/wp-content/plugins"}

bin/_lib.sh

@@ -1,5 +1,7 @@
 #!/usr/bin/env bash
 
+set +u
+
 install_wordpress() {
 	if [ -f $WP_CORE_DIR/wp-config.php ]; then
 		echo "Wordpress already installed."
@@ -47,7 +49,7 @@ remove_wordpress() {
 install_local_test_library() {
 	# Install testing library dependencies.
 	composer install
-	composer require --dev phpunit/phpunit:<=${PHPUNIT_VERSION}
+	composer require --dev phpunit/phpunit:${PHPUNIT_VERSION} \
 		lucatume/wp-browser \
 		codeception/module-asserts \
 		codeception/module-rest \