Icon Request: CircleCI
## Icon

This is a request for an icon for the CircleCI continuous integration tool. *Full disclosure, I work for CircleCI*. Similar to the group of icons already included that include Linode and DigitalOcean, CircleCI is a very common DevOps tool that is apart of many projects.

Here's a PNG of the icon: 
![circleci-icon-black-x1000](https://user-images.githubusercontent.com/6017470/102448334-e53b2100-3fff-11eb-9978-26451c56fa79.png)

and this is an SVG of the logo: https://drive.google.com/file/d/1TWpseBscwd0hA772Ck9RakO_kWrRsA94/view?usp=sharing


## Name Suggestion

`fa-circleci`


## Use Case

Again, this would have a similar use case to the VPS/cloud provider icons and the Linux distro icons that are already included. This can be used to show when a the codebase for an open source project is built and tested with CircleCI, but also for a tool where it can show that it has integration support for CircleCI.