Do not cache the drop payload for SeoTag

[ashmaroli]

For compatibility with Jekyll 4.0.. and current jekyll:master..

[joshgoebel]

Since we have the conditional is there a reason this is hung and not getting merged into master?

[ashmaroli]

is there a reason this is hung

Perhaps the maintainers are waiting for Jekyll core to finalize whether the said "caching Liquid templates" enhancement would be included in the final release in order to avoid unnecessary code-churn...

Additionally, the conditional is a hack and as of now, the line
if context.registers[:site].liquid_renderer.respond_to?(:cache) would be executed for every call to the drop method, affecting performance in sites not willing to upgrade to Jekyll 4.x..

Lots of decisions to take..

[joshgoebel]

Good points. I don't think the if/else would be that slow, but I suppose you can argue it'd be potentially slower than nothing at all that we're currently doing. :-)