Update sass and engines node

• Merge pull request #28 from YanaLugina/npmUpdate 68a8742
• updateSass: 1) update dependencie e58b910
• Merge pull request #27 from YanaLugina/updateSass e804f73
• updateSass: 1) Was updated node version 2) Was deleted node-sass 3) Was added sass 892146d

v2.2.3...v3.0.0