Update dependency ethers to v6

Author: supply-chain-sentinel[bot]

safe-contracts/package.json

@@ -64,7 +64,7 @@
         "eslint-plugin-no-only-tests": "^3.1.0",
         "eslint-plugin-prettier": "^4.2.1",
         "ethereum-waffle": "^3.3.0",
-        "ethers": "5.4.0",
+        "ethers": "6.16.0",
         "hardhat": "^2.2.1",
         "hardhat-deploy": "0.9.2",
         "husky": "^5.1.3",
@@ -79,6 +79,6 @@
         "yargs": "^16.1.1"
     },
     "peerDependencies": {
-        "ethers": "5.4.0"
+        "ethers": "6.16.0"
     }
 }

safe-singleton-factory/package.json

@@ -44,7 +44,7 @@
     "argv": "^0.0.2",
     "axios": "^0.21.1",
     "dotenv": "^8.0.0",
-    "ethers": "^5.1.4",
+    "ethers": "^6.0.0",
     "hardhat": "^2.2.1",
     "solc": "0.5.8",
     "ts-node": "^9.1.1",