Update Backers.

Author: trekhleb

BACKERS.md

@@ -1,3 +1,15 @@
-# Sponsors & Backers
+# Project Backers
 
-Work on this document is in progress...
+> You may support this project via ❤️️ [GitHub](https://github.com/sponsors/trekhleb) or ❤️️ [Patreon](https://www.patreon.com/trekhleb).  
+
+## `O(2ⁿ)` Backers
+
+⏳
+
+## `O(n²)` Backers
+
+⏳
+
+## `O(n×log(n))` Backers
+
+- [bullwinkle](https://github.com/bullwinkle)

README.md

@@ -306,6 +306,8 @@ Below is the list of some of the most used Big O notations and their performance
 | **Counting sort**     | n + r           | n + r               | n + r               | n + r     | Yes       | r - biggest number in array |
 | **Radix sort**        | n * k           | n * k               | n * k               | n + k     | Yes       | k - length of longest key |
 
-## Supporting the project
+## Project Backers
 
-You may support this project via ❤️️ [GitHub](https://github.com/sponsors/trekhleb) or ❤️️ [Patreon](https://www.patreon.com/trekhleb).          
+> You may support this project via ❤️️ [GitHub](https://github.com/sponsors/trekhleb) or ❤️️ [Patreon](https://www.patreon.com/trekhleb).
+
+See the [full list of backers](https://github.com/trekhleb/javascript-algorithms/blob/master/BACKERS.md)