feat(showcase): add “JAMstack.paris” to showcase (#9998)
feat(showcase): add “JAMstack.paris” to showcase (#9998)

Uses [Gatsby Source Meetup](https://github.com/phacks/gatsby-source-meetup) to gather Meetup.com information 😊

![image](https://user-images.githubusercontent.com/2587348/48662868-b05ae980-ea88-11e8-8385-b2466fa7a4e5.png)

gatsbyjs/gatsby,gatsbyjs/gatsby,0x80/gatsby,gatsbyjs/gatsby,0x80/gatsby,ChristopherBiscardi/gatsby,gatsbyjs/gatsby,0x80/gatsby,gatsbyjs/gatsby,ChristopherBiscardi/gatsby,ChristopherBiscardi/gatsby,ChristopherBiscardi/gatsby,gatsbyjs/gatsby