@makerstrap-bower-path is getting bound incorrectly

[Pomax]

I'm currently updating thimble to work on node v12, but makerstrap is causing problems because the ./build version of makerstrap.complete.less is pointing to the wrong bower_components location.

Its location, when installed, is:

./ bower_components
   |- makerstrap
      |- less
         |- build
            - makerstrap.complete.less

so in order to get to the bower dir it needs to point to ../../../bower_components. Instead, it's only pointing up two levels, and everything breaks =(