Drop webkit vendor prefixes to fix Firefox cursor issue #116.

Improve UI Testing

Add end-to-end testing using cypress. #55

Breaking changes

1. No longer listen to images with data-action="zoom" on initialization #68.
2. Remove defaultZoomable option.

All of the following will no longer make images zoomable:

1. Simply include a script.

2. Initialize a Zooming instance:

new Zooming()

3. Initialize a Zooming instance with defaultZoomable:

new Zooming({
    defaultZoomable: '.img-zoomable'
})

Instead, please ALWAYS call .listen() on target images after creating a Zooming instance:

const zooming = new Zooming({
    // options...
})

zooming.listen('.img-zoomable')

Support percentage value of the original image size in option customSize. #60 #61 #65

Support srcset for hi-res image #59.

• Add back babel-plugin-transform-object-assign #53
• Add .babelrc to .npmignore #54

Use the latest Rollup API to build bundles #52 with pkg.module support, which was suggested by @mahish .

Support pkg.module for rollup.

Support specifying individual image width and height after zoom-in #47 .

Fix CSS grid display issue in Chrome #42.

• Fix onGrab and onMove event hooks.
• Rewrite documentation page.