## 0.4.0 - 2020-10-01
### Added
  - add options `options.pinchable`, `options.enable_grid`, `options.enable_filter`, <br>`options.node.draggable`,`options.node.fit_grid`.
  - Improved dragging performance.
### Changed 
  - Change option `movable` -> `options.draggable`.

## 0.3.2 - 2020-09-28
### Fixed
- Fixed to multiply the movement distance when dragging the background by the scale.

## 0.3.1 - 2020-09-27
### Fixed
- Fixed change to multiply the movement distance when dragging the background by the scale.
- Fixed scale can't be changed.

## 0.3.0 - 2020-09-27
### Added
- Added keyline and curve to link types.

## x.x.x - 2020-xx-xx
### Added
### Changed
### Deprecated
### Removed
### Fixed
### Security