chore(package): update rollup-plugin-sourcemaps to version 0.6.1

Closes #71

Author: greenkeeper[bot]

package.json

@@ -128,7 +128,7 @@
     "rollup-plugin-node-resolve": "^3.0.0",
     "rollup-plugin-postcss": "^1.6.1",
     "rollup-plugin-scss": "^0.4.0",
-    "rollup-plugin-sourcemaps": "^0.4.2",
+    "rollup-plugin-sourcemaps": "^0.6.1",
     "rollup-plugin-typescript2": "^0.14.0",
     "sass-loader": "^7.0.1",
     "semantic-release": "^15.9.16",