node-sass 1.0.0 & libsass 3.0.0!

$ npm update --save-dev grunt-sass

Updated to node-sass 1.0.0: https://github.com/sass/node-sass/releases/tag/v1.0.0
Which updates libsass to 3.0.0: https://github.com/sass/libsass/releases/tag/3.0

Do note that the sourceMap option is broken in node-sass.
sourceMap: true should work fine. (I added a temporary workaround in grunt-sass)
sourceMap: 'path' however does not. (Which is why the tests are failing...)

0.14.0 - precision option

New precision option. Useful for Bootstrap Sass.

node-sass changelog.

0.13.0 - libsass 2.0, .sass syntax, BEM-selector support

See the node-sass changelog.

Highlights: libsass 2.0, .sass syntax, BEM-selector support.