echarts-gl add maptalks support
exmaples:
http://gallery.echartsjs.com/editor.html?c=xBJ33yLImM
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http://gallery.echartsjs.com/editor.html?c=xrkUpMLI7z
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http://gallery.echartsjs.com/editor.html?c=xH1gON887G
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http://gallery.echartsjs.com/editor.html?c=xrJzIDLLXf
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http://gallery.echartsjs.com/editor.html?c=xHk57t88Xz
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http://gallery.echartsjs.com/editor.html?c=xHJ8EiI8QG
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http://gallery.echartsjs.com/editor.html?c=xrkNgaUUmf
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http://gallery.echartsjs.com/editor.html?c=xByh-kvLmf
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http://gallery.echartsjs.com/editor.html?c=xH1XqxDU7M
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http://gallery.echartsjs.com/editor.html?c=xrJlTC-v4M
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http://gallery.echartsjs.com/editor.html?c=xSkUuZMD4z
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http://gallery.echartsjs.com/editor.html?c=xr1bg4MDVz
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http://gallery.echartsjs.com/editor.html?c=xHyiG_MDEz
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http://gallery.echartsjs.com/editor.html?c=xBk3CTMD4G
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http://gallery.echartsjs.com/editor.html?c=xByRILmvNM
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