Use automated fetching to keep sponsors updated

Copied from Parcel's approach:
https://github.com/parcel-bundler/parcel/blob/v2/packages/core/parcel/README.md
https://github.com/parcel-bundler/website/blob/v2/src/home/open-source.html

Some bits might be redundant ...

Author: fatso83

README.md

@@ -64,38 +64,10 @@ See [CONTRIBUTING.md](CONTRIBUTING.md) for details on how you can contribute to
 
 ## Backers
 
-Support us with a monthly donation and help us continue our activities. [[Become a backer](https://opencollective.com/sinon#backer)]
-
-<a href="https://opencollective.com/sinon/backer/0/website" target="_blank"><img src="https://opencollective.com/sinon/backer/0/avatar.svg"></a>
-<a href="https://opencollective.com/sinon/backer/1/website" target="_blank"><img src="https://opencollective.com/sinon/backer/1/avatar.svg"></a>
-<a href="https://opencollective.com/sinon/backer/2/website" target="_blank"><img src="https://opencollective.com/sinon/backer/2/avatar.svg"></a>
-<a href="https://opencollective.com/sinon/backer/3/website" target="_blank"><img src="https://opencollective.com/sinon/backer/3/avatar.svg"></a>
-<a href="https://opencollective.com/sinon/backer/4/website" target="_blank"><img src="https://opencollective.com/sinon/backer/4/avatar.svg"></a>
-<a href="https://opencollective.com/sinon/backer/5/website" target="_blank"><img src="https://opencollective.com/sinon/backer/5/avatar.svg"></a>
-<a href="https://opencollective.com/sinon/backer/6/website" target="_blank"><img src="https://opencollective.com/sinon/backer/6/avatar.svg"></a>
-<a href="https://opencollective.com/sinon/backer/7/website" target="_blank"><img src="https://opencollective.com/sinon/backer/7/avatar.svg"></a>
-<a href="https://opencollective.com/sinon/backer/8/website" target="_blank"><img src="https://opencollective.com/sinon/backer/8/avatar.svg"></a>
-<a href="https://opencollective.com/sinon/backer/9/website" target="_blank"><img src="https://opencollective.com/sinon/backer/9/avatar.svg"></a>
-<a href="https://opencollective.com/sinon/backer/10/website" target="_blank"><img src="https://opencollective.com/sinon/backer/10/avatar.svg"></a>
-<a href="https://opencollective.com/sinon/backer/11/website" target="_blank"><img src="https://opencollective.com/sinon/backer/11/avatar.svg"></a>
-<a href="https://opencollective.com/sinon/backer/12/website" target="_blank"><img src="https://opencollective.com/sinon/backer/12/avatar.svg"></a>
-<a href="https://opencollective.com/sinon/backer/13/website" target="_blank"><img src="https://opencollective.com/sinon/backer/13/avatar.svg"></a>
-<a href="https://opencollective.com/sinon/backer/14/website" target="_blank"><img src="https://opencollective.com/sinon/backer/14/avatar.svg"></a>
-<a href="https://opencollective.com/sinon/backer/15/website" target="_blank"><img src="https://opencollective.com/sinon/backer/15/avatar.svg"></a>
-<a href="https://opencollective.com/sinon/backer/16/website" target="_blank"><img src="https://opencollective.com/sinon/backer/16/avatar.svg"></a>
-<a href="https://opencollective.com/sinon/backer/17/website" target="_blank"><img src="https://opencollective.com/sinon/backer/17/avatar.svg"></a>
-<a href="https://opencollective.com/sinon/backer/18/website" target="_blank"><img src="https://opencollective.com/sinon/backer/18/avatar.svg"></a>
-<a href="https://opencollective.com/sinon/backer/19/website" target="_blank"><img src="https://opencollective.com/sinon/backer/19/avatar.svg"></a>
-<a href="https://opencollective.com/sinon/backer/20/website" target="_blank"><img src="https://opencollective.com/sinon/backer/20/avatar.svg"></a>
-<a href="https://opencollective.com/sinon/backer/21/website" target="_blank"><img src="https://opencollective.com/sinon/backer/21/avatar.svg"></a>
-<a href="https://opencollective.com/sinon/backer/22/website" target="_blank"><img src="https://opencollective.com/sinon/backer/22/avatar.svg"></a>
-<a href="https://opencollective.com/sinon/backer/23/website" target="_blank"><img src="https://opencollective.com/sinon/backer/23/avatar.svg"></a>
-<a href="https://opencollective.com/sinon/backer/24/website" target="_blank"><img src="https://opencollective.com/sinon/backer/24/avatar.svg"></a>
-<a href="https://opencollective.com/sinon/backer/25/website" target="_blank"><img src="https://opencollective.com/sinon/backer/25/avatar.svg"></a>
-<a href="https://opencollective.com/sinon/backer/26/website" target="_blank"><img src="https://opencollective.com/sinon/backer/26/avatar.svg"></a>
-<a href="https://opencollective.com/sinon/backer/27/website" target="_blank"><img src="https://opencollective.com/sinon/backer/27/avatar.svg"></a>
-<a href="https://opencollective.com/sinon/backer/28/website" target="_blank"><img src="https://opencollective.com/sinon/backer/28/avatar.svg"></a>
-<a href="https://opencollective.com/sinon/backer/29/website" target="_blank"><img src="https://opencollective.com/sinon/backer/29/avatar.svg"></a>
+Thank you to all our backers! 🙏 [[Become a backer](https://opencollective.com/sinon#backer)]
+
+<a href="https://opencollective.com/sinon#backers" target="_blank"><img src="https://opencollective.com/sinon/backers.svg?width=890"></a>
+
 
 ## Sponsors
 
@@ -112,25 +84,6 @@ Become a sponsor and get your logo on our README on GitHub with a link to your s
 <a href="https://opencollective.com/sinon/sponsor/8/website" target="_blank"><img src="https://opencollective.com/sinon/sponsor/8/avatar.svg"></a>
 <a href="https://opencollective.com/sinon/sponsor/9/website" target="_blank"><img src="https://opencollective.com/sinon/sponsor/9/avatar.svg"></a>
 <a href="https://opencollective.com/sinon/sponsor/10/website" target="_blank"><img src="https://opencollective.com/sinon/sponsor/10/avatar.svg"></a>
-<a href="https://opencollective.com/sinon/sponsor/11/website" target="_blank"><img src="https://opencollective.com/sinon/sponsor/11/avatar.svg"></a>
-<a href="https://opencollective.com/sinon/sponsor/12/website" target="_blank"><img src="https://opencollective.com/sinon/sponsor/12/avatar.svg"></a>
-<a href="https://opencollective.com/sinon/sponsor/13/website" target="_blank"><img src="https://opencollective.com/sinon/sponsor/13/avatar.svg"></a>
-<a href="https://opencollective.com/sinon/sponsor/14/website" target="_blank"><img src="https://opencollective.com/sinon/sponsor/14/avatar.svg"></a>
-<a href="https://opencollective.com/sinon/sponsor/15/website" target="_blank"><img src="https://opencollective.com/sinon/sponsor/15/avatar.svg"></a>
-<a href="https://opencollective.com/sinon/sponsor/16/website" target="_blank"><img src="https://opencollective.com/sinon/sponsor/16/avatar.svg"></a>
-<a href="https://opencollective.com/sinon/sponsor/17/website" target="_blank"><img src="https://opencollective.com/sinon/sponsor/17/avatar.svg"></a>
-<a href="https://opencollective.com/sinon/sponsor/18/website" target="_blank"><img src="https://opencollective.com/sinon/sponsor/18/avatar.svg"></a>
-<a href="https://opencollective.com/sinon/sponsor/19/website" target="_blank"><img src="https://opencollective.com/sinon/sponsor/19/avatar.svg"></a>
-<a href="https://opencollective.com/sinon/sponsor/20/website" target="_blank"><img src="https://opencollective.com/sinon/sponsor/20/avatar.svg"></a>
-<a href="https://opencollective.com/sinon/sponsor/21/website" target="_blank"><img src="https://opencollective.com/sinon/sponsor/21/avatar.svg"></a>
-<a href="https://opencollective.com/sinon/sponsor/22/website" target="_blank"><img src="https://opencollective.com/sinon/sponsor/22/avatar.svg"></a>
-<a href="https://opencollective.com/sinon/sponsor/23/website" target="_blank"><img src="https://opencollective.com/sinon/sponsor/23/avatar.svg"></a>
-<a href="https://opencollective.com/sinon/sponsor/24/website" target="_blank"><img src="https://opencollective.com/sinon/sponsor/24/avatar.svg"></a>
-<a href="https://opencollective.com/sinon/sponsor/25/website" target="_blank"><img src="https://opencollective.com/sinon/sponsor/25/avatar.svg"></a>
-<a href="https://opencollective.com/sinon/sponsor/26/website" target="_blank"><img src="https://opencollective.com/sinon/sponsor/26/avatar.svg"></a>
-<a href="https://opencollective.com/sinon/sponsor/27/website" target="_blank"><img src="https://opencollective.com/sinon/sponsor/27/avatar.svg"></a>
-<a href="https://opencollective.com/sinon/sponsor/28/website" target="_blank"><img src="https://opencollective.com/sinon/sponsor/28/avatar.svg"></a>
-<a href="https://opencollective.com/sinon/sponsor/29/website" target="_blank"><img src="https://opencollective.com/sinon/sponsor/29/avatar.svg"></a>
 
 ## Licence