v4.4.0

Toggle v4.4.0's commit message

Switch JSON parsing to Gson for improved reliability (#91)

* update to use gson parser

* add tests

* add gson dependency and handle jsonUtil

* handle exception with jsonutil

* add null check

* version bump-up

v4.3.0

Toggle v4.3.0's commit message

Enable async api support (#88)

* Enable async api support

* version bump-up and change log

* add JavaDoc

* Exception handling document

* add configurable executor service

* Version bump-up

v4.1.1

Toggle v4.1.1's commit message

add filter support based on enum (#85)

* add filter support based on enum

* change log and version bump-up