update echarts remove warning

Author: PanJiaChen

package.json

@@ -16,7 +16,7 @@
     "axios": "0.16.2",
     "codemirror": "5.26.0",
     "dropzone": "5.1.0",
-    "echarts": "3.6.1",
+    "echarts": "3.6.2",
     "element-ui": "1.4.1",
     "file-saver": "1.3.3",
     "jquery": "3.1.1",