[0.0.1] - 2019. Created the Argon Loading and Timer buttons [1.0.0] - 2019. Added Example [1.0.5] - 2020-07-11. Added dispose to the animation controller [1.0.6] - 2020-08-18. Cancel timer when button is disposed [1.1.0] - 2021-05-07. Flutter 2.0 Null safety