update dep for v4 tests
update dep for v4 tests

ryanmark/middleman-sprockets,middleman/middleman-sprockets,williamcoates/middleman-sprockets,williamcoates/middleman-sprockets,ryanmark/middleman-sprockets,ryanmark/middleman-sprockets,middleman/middleman-sprockets,williamcoates/middleman-sprockets,middleman/middleman-sprockets