Add PCA9536D library (#2497)

Beirdo · web-flow · commit 499d4e7fadaa · 2023-02-20T14:57:34.000Z
- stripped down version of the SparkFun one.
diff --git a/repositories.txt b/repositories.txt
@@ -5593,3 +5593,4 @@ https://github.com/jpconstantineau/BlueMicro_SAMD_Arduino_Library
 https://github.com/Bodmer/OpenWeather
 https://github.com/nyannkov/Psgino
 https://github.com/Beirdo/Arduino-LM96163
+https://github.com/Beirdo/Arduino-PCA9536
