old_contents: {
      'name' : 'Clear cart button',
      'version' : '1.0.0',
      'author' : 'Ivan Yelizariev',
      'category' : 'Sale',
      'website' : 'https://yelizariev.github.io',
      'price': 9.00,
      'currency': 'EUR',
      'depends' : ['website_sale'],
      'data':[
          'website_sale_clear_cart_views.xml',
      ],
      'installable': True
  }
  
new_contents: {
      'name' : 'Clear cart button',
      'version' : '1.0.0',
      'author' : 'Ivan Yelizariev',
      'category' : 'Website',
      'website' : 'https://yelizariev.github.io',
      'price': 9.00,
      'currency': 'EUR',
      'depends' : ['website_sale'],
      'data':[
          'website_sale_clear_cart_views.xml',
      ],
      'installable': True
  }
  
subject: fix category