Update dependency ethers to v6

Author: renovate[bot]

package.json

@@ -25,7 +25,7 @@
 		"bent": "7.3.12",
 		"bignumber.js": "9.1.2",
 		"cross-fetch": "4.0.0",
-		"ethers": "5.7.2",
+		"ethers": "6.13.5",
 		"mathjs": "12.4.1",
 		"ramda": "0.29.1"
 	},