chore: update dependency ethers to v6

Signed-off-by: Renovate Bot <[email protected]>

package.json

@@ -57,7 +57,7 @@
     "@collabland/chain": "^0.33.2",
     "@loopback/core": "^4.0.6",
     "@loopback/repository": "^5.1.1",
-    "ethers": "^5.7.0",
+    "ethers": "^6.0.0",
     "@nomiclabs/hardhat-ethers": "^2.0.6",
     "@nomiclabs/hardhat-solhint": "^3.0.0",
     "@typechain/ethers-v5": "^10.1.0",