Update Ethers.js from 5.0.30 to 5.3.0

ethers.js before 5.3.0 is using ws 7.2.3. This version of ws is vulnerable to Regular Expression Denial of Service (ReDoS). A specially crafted value of the Sec-Websocket-Protocol header can be used to significantly slow down a ws server. ethers.js 5.3.0 has been updated to use a version of ws that is not vulnerable to this.

ethers-io/ethers.js#1634
websockets/ws@00c425e

package.json

@@ -32,7 +32,7 @@
     "@types/file-saver": "^2.0.1",
     "ansi_up": "^5.0.0",
     "echarts": "^4.9.0",
-    "ethers": "^5.0.30",
+    "ethers": "^5.3.0",
     "file-saver": "^2.0.5",
     "jszip": "^3.6.0",
     "leaflet": "^1.7.1",