Update package.json

Author: songyumeng

src/mapboxgl/package.json

@@ -20,7 +20,7 @@
  "three": "0.92.0",
  "xlsx": "0.15.3",
  "@supermap/iclient-common": "10.0.1",
- "canvg": "1.5.3",
+ "canvg": "3.0.2",
  "xml-js": "1.6.8"
  }
 }