5.10+ fails on perl-5.18.1: needs Router::Simple::Sinatraish

Seems like new Amon2 needs an explicit dep on Router::Simple::Sinatraish.

    Can't locate Router/Simple/Sinatraish.pm in @INC
    
    Compilation failed in require at t/800_dispatcher/003_lite.t line 18.
    BEGIN failed--compilation aborted at t/800_dispatcher/003_lite.t line 18.
    # Looks like your test exited with 2 before it could output anything.
    t/800_dispatcher/003_lite.t ....................