chore(package): update rimraf to version 3.0.1

Closes #79

Author: greenkeeper[bot]

package.json

@@ -102,7 +102,7 @@
     "node-sass": "^4.5.2",
     "npm-run-all": "^4.0.2",
     "npm-watch": "^0.2.0",
-    "rimraf": "^2.6.1",
+    "rimraf": "^3.0.1",
     "rollup": "^0.42.0",
     "rollup-plugin-sourcemaps": "^0.4.1",
     "rollup-plugin-uglify": "^2.0.1",