Request: Support for '->>' ligature #405

Hi! Thanks for making Monaspace.

I've noticed that the -> ligature works as expected, but ->> does not appear as a single ligature.

In Clojure and ClojureScript, -> and ->> are both commonly used threading macros, so having consistent ligature support for both would be useful.

Expected behavior

->> should render as a ligature, consistent with the existing -> ligature.