(docs) add 5.0 release info to changelog

Author: pusherman

CHANGELOG.md

@@ -1,3 +1,14 @@
+## 5.0.0 - 2019-05-25 (Itsy Bitsy)
+
+### Breaking Changes
+- (iOS/Android) Switched from callbacks to async methods (thanks @hosseinmd)
+- (Android) Migrated to AndroidX (thanks @rafcontreras)
+
+### Bug Fix
+- (Android) Updated dependency configurations for Android (thanks @robwalkerco)
+- (npm) Removed android/build from npm package to reduce size
+
+
 ## 4.0.1 - 2019-01-09 (Traveling On)
 
 ### Bug Fix