parseDisplayValue doesnt support "-webkit-" styles

[SuperCoolSEBoy]

Please make sure you are testing with the latest release of html2canvas.
Old versions are not supported and issues reported for them will be closed.

Please follow the general troubleshooting steps first:

• [yes] You are using the latest version
• [yes] You are testing using the non-minified version of html2canvas and checked any potential issues reported in the console

Bug reports:

parseDisplayValue function in src/parsing/display.js doesn't support "-web-kit-*" styles.
I am testing with Microsoft Edge and have an element with display value as "-web-kit-flex". But parseDisplayValue returns Display.None since it's not in the supported list. And later, that element won't be rendered on the canvas since it is "invisible".

it works as expected on other browsers except Edge (even IE11 works). Hope the new chromiun Edge would have this problem solved. But at least for the latest released version, it is broken.

Open it in Edge, you will only see one red square. But in other browsers, you will see 2.
https://jsfiddle.net/7dqL4jf2/

Specifications:

• html2canvas version tested with: html2canvas 1.0.0-rc.1
• Browser & version: Microsoft Edge 44.17763.1.0, Microsoft EdgeHTML 18.17763
• Operating system: Windows 10