chore(package): update rollup-plugin-scss to version 2.4.0

Closes #56

Author: greenkeeper[bot]

package.json

@@ -127,7 +127,7 @@
     "rollup-plugin-json": "^3.0.0",
     "rollup-plugin-node-resolve": "^3.0.0",
     "rollup-plugin-postcss": "^1.6.1",
-    "rollup-plugin-scss": "^0.4.0",
+    "rollup-plugin-scss": "^2.4.0",
     "rollup-plugin-sourcemaps": "^0.4.2",
     "rollup-plugin-typescript2": "^0.14.0",
     "sass-loader": "^7.0.1",