Bumping dependencies and Migration (#44)

* Bumped dependency

* Migration: Replaced all deprecated code

* octokit upgrade

Author: Yugandhartripathi

gatsby-config.js

@@ -1,3 +1,3 @@
 module.exports = {
-  plugins: [`gatsby-plugin-styled-components`]
+  plugins: [`gatsby-plugin-styled-components`,`gatsby-plugin-react-helmet`]
 };