Add an explicit invokelatest after delete_method in loop

[Keno]

Loops will no longer have implicit world age increments at top level in Julia 1.12. See JuliaLang/julia#56509.

[oxinabox]

This needs a fix so julia 1.3 works

Probably just by defining a dummy function called invokelatest(f) = f() if on version older than 1.3 (or what ever it was that introduced this)