Update changelog

sandeepmistry · sandeepmistry · commit 7bed794679ea · 2016-05-30T12:08:38.000-04:00
diff --git a/CHANGELOG b/CHANGELOG
@@ -1,3 +1,7 @@
+SAMD CORE
+
+ * Fixed Serial.flush() blocking before any writes. Thanks @hangmoh
+
 SAMD CORE 1.6.6 2016.05.19
 
 * Fixed digitalPinToInterrupt() macro, now it works as documented.
