DragEvent is not supported on all Safari Browsers

[IMFIL]

Hey @Yuyz0112

tag 1.0.0-beta.0 (https://github.com/rrweb-io/rrweb/releases/tag/1.0.0-beta.0) Introduced a pretty bad bug where the browser tries to access the DragEvent window attribute but that attribute does not exist on Safari browsers.

(https://stackoverflow.com/questions/56137343/angular-not-working-on-safari-browser-but-working-well-on-other-browsers).

[YunFeng0817]

Looks like safari already has the full support of DragEvent since v3.1.

[IMFIL]

Yeah, I am seeing that as well. I am getting errors on mobile Iphones running ios 13.5 and Safari 13.1. The error message is: Cannot find variable DragEvent.

[Yuyz0112]

merged #630 to fix this