fix: upgrade foundation-sites from 6.3.1 to 6.6.2 (#16)

Snyk has created this PR to upgrade foundation-sites from 6.3.1 to 6.6.2.

See this package in NPM:
https://www.npmjs.com/package/foundation-sites

See this project in Snyk:
https://app.snyk.io/org/narshe1412/project/00135e5c-e6ff-4699-9ea9-7722a2e86dde?utm_source=github&utm_medium=upgrade-pr

Author: snyk-bot

package.json

@@ -29,7 +29,7 @@
     "babel-preset-stage-0": "^6.5.0",
     "css-loader": "^1.0.0",
     "expect": "^1.14.0",
-    "foundation-sites": "6.3.1",
+    "foundation-sites": "6.6.2",
     "jquery": "^3.0.0",
     "karma": "^3.0.0",
     "karma-chrome-launcher": "^0.2.2",