Fix Jekyll::Tags::HighlightBlock.new vs .parse again
Fix Jekyll::Tags::HighlightBlock.new vs .parse again

I have once again run into the dreaded

    Liquid Exception: private method `new' called for Jekyll::Tags::HighlightBlock:Class

error.  I've tracked down the change in Liquid v3 which caused the error
and documented it along with a check that handles both cases.  Hopefully
this will solve the problem permanently.

Signed-off-by: Kevin Locke <ffb4761cba839470133bee36aeb139f58d7dbaa9@kevinlocke.name>

kevinoid/jekyll-highlight-file