Adapts to OJS 3.4

[YvesLepidus]

Hi, @ajnyga 😃
This PR adapts the plugin to OJS 3.4

[ajnyga]

Hi, sorry for not noticing this before, I did a new release for 3.4 and looking through your pr I think everything is covered.

What I do not know is whether the changes to version.xml are required. In your pr you are removing lazy-load 1 /lazy-load and class OpenGraphPlugin /class. Can you give me some additional details what that means in practice? I was looking at the other plugins in OJS and they seem to still have those lines.

The new version I released also includes metatags in the issue landing page, since that seems to be more commonly shared.

[YvesLepidus]

Hi, @ajnyga 😃
The plugins documentation for version 3.4 has a more simplified version.xml compared to the example for version 3.3.
I couldn't find an explanation of these changes in the documentation. So if you want more details, I can ask on PKP Mattermost.

[ajnyga]

Thanks! That is weird since all the PKP maintained plugins still seem to have those lines there. Of course if they are simply not used it would not matter, so could be just an oversight. I tried to look for a github issue about this as well but no luck.

I asked this in Mattermost just to be sure.