build: upgrade to solidity v0.8.9

build: add "lodash" as dev dep

hardhat.config.ts

@@ -75,7 +75,7 @@ const config: HardhatUserConfig = {
     tests: "./test",
   },
   solidity: {
-    version: "0.8.7",
+    version: "0.8.9",
     settings: {
       metadata: {
         // Not including the metadata hash

package.json

@@ -39,6 +39,7 @@
     "hardhat-gas-reporter": "^1.0.4",
     "husky": "^7.0.2",
     "lint-staged": "^11.2.0",
+    "lodash": "^4.17.21",
     "mocha": "^9.1.2",
     "prettier": "^2.4.1",
     "prettier-plugin-solidity": "^1.0.0-beta.18",

yarn.lock

@@ -1284,6 +1284,7 @@ __metadata:
     hardhat-gas-reporter: ^1.0.4
     husky: ^7.0.2
     lint-staged: ^11.2.0
+    lodash: ^4.17.21
     mocha: ^9.1.2
     prettier: ^2.4.1
     prettier-plugin-solidity: ^1.0.0-beta.18