Require sass >= 3.5.2

[gmacdougall]

Bootstrap 4.x requires at least sass 3.5.2.

For more information see:
twbs/bootstrap-rubygem#122
sass/sass#2383

[jhawthorn]

LGTM

[tvdeyen]

Why is this change needed? Doesn’t bundler resolve this automatically for us?

In order to support SassC (a much faster, C based Sass implementation) we should actually remove the sass and sass-rails dependencies from our gemspecs and tell our users to add the Sass implementation of their liking.

[gmacdougall]

Right now we don't have a specific sass version requirement so bundler will resolve to any version of sass. We require 3.5.2 or greater due to the issues linked.

[jhawthorn]

In order to support SassC (a much faster, C based Sass implementation) we should actually remove the sass and sass-rails dependencies from our gemspecs and tell our users to add the Sass implementation of their liking.

I think this still works with both included. sassc-rails even depends on sass

[tvdeyen]

Thanks for clarifying