Hotfix/add to cart js function

[supercid]

Related Issue

Continues #529 which have not fixed the issue.

How Has This Been Tested?

    Nosto.addMultipleProductsToCart([
        {'productId' : '402', 'skuId' : '231'}, // Configurable
        {'productId' : '402', 'skuId' : '232'}, // Configurable
        {'productId' : '408', 'skuId' : '252'}, // Configurable
        {'productId' : '408', 'skuId' : '253'}, // Configurable
        {'productId' : '878', 'skuId' : '878'}, // Not visible individually, should not have link or photograph
        {'productId' : '339', 'skuId' : '339'} // Simple and visible, should have link and picture
    ], this);

Documentation:

Checklist:

• [x] My code follows the code style of this project.
• [x] I have updated the documentation accordingly.
• [x] All new and existing tests passed.
• [x] I have assigned the correct milestone or created one if non existent.
• [x] I have correctly labeled this pull request.
• [x] I have linked the corresponding issue in this description.
• [x] I have updated the corresponding Jira ticket.
• [x] I have requested a review from at least 2 reviewers
• [x] I have checked the base branch of this pull request
• [x] I have checked my code for any possible security vulnerabilities
• [x] Squash on merge