Extract _ geteventparams is reused in other plug-ins

[deyihu]

maptalks's version and what browser you use?

Issue description

https://github.com/maptalks/maptalks.js/blob/613beef7478bea5022a1aeeeb67000b7b9bd802d/src/geometry/ext/Geometry.Events.js?_pjax=%23js-repo-pjax-container#L40

Please provide a reproduction URL (on any jsfiddle like site)