Cubism 5 SDK for Web R2

Added

• Add a function to notify when motion playback starts.

Changed

• Modify to run tsc --noEmit command during development build for type checking.
• Change to be able to handle multiple <canvas>.
• The interfaces MouseEvent and TouchEvent are deprecated and consolidate into PointerEvent.
• Change to overwrite motion fade by the value specified in .model3.json on Framework.
• Change the function for playing back expression motions from CustomExpressionMotionManager.startMotionPriority() to CustomExpressionMotionManager.startMotion().

Fixed

• Fix eslintrc.yml to conform to the exact wording.
• Fix a bug that the eye tracking behavior was not released when dragging is released outside of a canvas element.
• Fix an issue where WebGLRenderingContext.deleteTexture() was not being called in releaseTextures(), releaseTextureByTexture(), and releaseTextureByFilePath().