[1.0.8] Fix opacity. [1.0.7] Remove debug print. [1.0.6] Support BoxShape.circle. [1.0.5] Add copyWith to BoxDecoration. [1.0.4] Fix README.md. [1.0.3] Add example. [1.0.2] Fix inner shadows painting. [1.0.1] Transitions between inner and outer shadows are now better. [1.0.0] Initial release