chore(package): update sass-loader to version 7.0.3

Author: greenkeeper[bot]

package.json

@@ -34,7 +34,7 @@
     "mini-css-extract-plugin": "0.4.0",
     "node-sass": "4.9.0",
     "postcss-loader": "2.1.5",
-    "sass-loader": "7.0.2",
+    "sass-loader": "7.0.3",
     "stylelint": "9.2.1",
     "stylelint-order": "0.8.1",
     "stylelint-scss": "3.1.0",