chore(deps): update dependency hardhat to v2.6.4 (#27)

Co-authored-by: Renovate Bot <bot@renovateapp.com>

package-lock.json

@@ -27,7 +27,7 @@
                 "chai-ethers": "0.0.1",
                 "dotenv": "10.0.0",
                 "ethers": "5.4.6",
-                "hardhat": "2.6.3",
+                "hardhat": "2.6.4",
                 "hardhat-deploy": "0.9.1",
                 "mocha-skip-if": "0.0.3",
                 "prettier": "2.3.2",
@@ -7130,9 +7130,9 @@
             }
         },
         "node_modules/hardhat": {
-            "version": "2.6.3",
-            "resolved": "https://registry.npmjs.org/hardhat/-/hardhat-2.6.3.tgz",
-            "integrity": "sha512-gKcltj1s4RyCMz1zqdDuIm9SLzxRno3WKuXPHryvSOYzdC1kkbPWEsGLcj3hCU39WFqCjkcbdXes1alREoADTw==",
+            "version": "2.6.4",
+            "resolved": "https://registry.npmjs.org/hardhat/-/hardhat-2.6.4.tgz",
+            "integrity": "sha512-6QNfu1FptjtyGJ+jBR7LMX7AMY9gWWw9kAUD7v0YZNZH1ZBgsZdMHqXKiSzO5pLQXo+fy9zZovKAUNYbjQ/1fw==",
             "dev": true,
             "dependencies": {
                 "@ethereumjs/block": "^3.4.0",
@@ -19135,9 +19135,9 @@
             }
         },
         "hardhat": {
-            "version": "2.6.3",
-            "resolved": "https://registry.npmjs.org/hardhat/-/hardhat-2.6.3.tgz",
-            "integrity": "sha512-gKcltj1s4RyCMz1zqdDuIm9SLzxRno3WKuXPHryvSOYzdC1kkbPWEsGLcj3hCU39WFqCjkcbdXes1alREoADTw==",
+            "version": "2.6.4",
+            "resolved": "https://registry.npmjs.org/hardhat/-/hardhat-2.6.4.tgz",
+            "integrity": "sha512-6QNfu1FptjtyGJ+jBR7LMX7AMY9gWWw9kAUD7v0YZNZH1ZBgsZdMHqXKiSzO5pLQXo+fy9zZovKAUNYbjQ/1fw==",
             "dev": true,
             "requires": {
                 "@ethereumjs/block": "^3.4.0",

package.json

@@ -39,7 +39,7 @@
         "chai-ethers": "0.0.1",
         "dotenv": "10.0.0",
         "ethers": "5.4.6",
-        "hardhat": "2.6.3",
+        "hardhat": "2.6.4",
         "hardhat-deploy": "0.9.1",
         "mocha-skip-if": "0.0.3",
         "prettier": "2.3.2",