Update dependency eslint-config-prettier to v6.15.0

Author: renovate[bot]

package.json

@@ -71,7 +71,7 @@
 		"@typechain/ethers-v5": "10.2.0",
 		"@typechain/hardhat": "6.1.5",
 		"eslint": "8.1.0",
-		"eslint-config-prettier": "6.11.0",
+		"eslint-config-prettier": "6.15.0",
 		"eslint-plugin-prettier": "3.1.4",
 		"nodemon": "2.0.20",
 		"prettier": "2.0.5",