Update dependency @openzeppelin/contracts to v4.7.1

Author: renovate[bot]

package.json

@@ -22,7 +22,7 @@
 	"devDependencies": {
 		"@nomiclabs/hardhat-ethers": "2.1.0",
 		"@nomiclabs/hardhat-waffle": "2.0.3",
-		"@openzeppelin/contracts": "4.7.0",
+		"@openzeppelin/contracts": "4.7.1",
 		"@types/chai": "4.3.1",
 		"@types/dotenv": "8.2.0",
 		"@types/mocha": "9.1.1",

yarn.lock

@@ -1336,10 +1336,10 @@
   resolved "https://registry.yarnpkg.com/@openzeppelin/contracts-upgradeable/-/contracts-upgradeable-4.3.2.tgz#92df481362e366c388fc02133cf793029c744cea"
   integrity sha512-i/pOaOtcqDk4UqsrOv735uYyTbn6dvfiuVu5hstsgV6c4ZKUtu88/31zT2BzkCg+3JfcwOfgg2TtRKVKKZIGkQ==
 
-"@openzeppelin/contracts@4.7.0":
-  version "4.7.0"
-  resolved "https://registry.yarnpkg.com/@openzeppelin/contracts/-/contracts-4.7.0.tgz#3092d70ea60e3d1835466266b1d68ad47035a2d5"
-  integrity sha512-52Qb+A1DdOss8QvJrijYYPSf32GUg2pGaG/yCxtaA3cu4jduouTdg4XZSMLW9op54m1jH7J8hoajhHKOPsoJFw==
+"@openzeppelin/contracts@4.7.1":
+  version "4.7.1"
+  resolved "https://registry.yarnpkg.com/@openzeppelin/contracts/-/contracts-4.7.1.tgz#33d0a857b76b18d313e6bb6ed28cdaf367e90cfe"
+  integrity sha512-UXmAjKARsXORHlHZu5GCD7ZbRKm6nU8UHnbuT/QJJa2JEOEcbvV/X8w/sUk62Sl9VZuuljM1akrZLyAtzUgsxw==
 
 "@resolver-engine/core@^0.3.3":
   version "0.3.3"