update changelog for 0.8.4

hathach · hathach · commit 79db751dc2d7 · 2018-07-12T16:58:09.000+07:00
diff --git a/changelog.md b/changelog.md
@@ -1,5 +1,12 @@
 # Adafruit nRF52 Arduino Core Changelog
 
+## 0.8.4
+
+- Fix #160: hardware PWM issue that cause Servo freq is 640 hz instead of 50hz
+- Fix #134:  hardcoded pulse limits with Servo
+- Fix upload issue with windows when username has spaces
+- Support serialEvent()
+
 ## 0.8.3
 
 - Enhanced indicate API() to wait for confirm or timeout from peer.
