Making non-clickable out of stock items

[jafarp26]

Can we make the out of stock item non clickable, Right now all the items are being shown but we can not differentiate which is out of stock. Is anything possible to strike out and make non clickable if it is out of stock.

[lamasfoker]

See this PR #4

[dabeedj]

I am using Magento 2.2.6 with this plugin and I can't upgrade:(. Is there any chance to gray-out/disable out of stock items already?