chore: add "clean" script

build: add "rimraf" dev dep

package.json

@@ -15,6 +15,7 @@
     "lint-staged": "^13.0.3",
     "prettier": "^2.7.1",
     "prettier-plugin-solidity": "^1.0.0-dev.22",
+    "rimraf": "^3.0.2",
     "solhint": "^3.3.7",
     "solhint-plugin-prettier": "^0.0.5"
   },
@@ -30,6 +31,7 @@
   "packageManager": "yarn@3.2.1",
   "private": true,
   "scripts": {
+    "clean": "rimraf cache out",
     "lint": "solhint --config \"./.solhint.json\" \"{src,test}/**/*.sol\"",
     "postinstall": "husky install",
     "prettier": "prettier --config \"./.prettierrc.yml\" --write \"**/*.{json,md,sol,yml}\"",

yarn.lock

@@ -266,6 +266,7 @@ __metadata:
     lint-staged: ^13.0.3
     prettier: ^2.7.1
     prettier-plugin-solidity: ^1.0.0-dev.22
+    rimraf: ^3.0.2
     solhint: ^3.3.7
     solhint-plugin-prettier: ^0.0.5
   languageName: unknown
@@ -2803,6 +2804,17 @@ __metadata:
   languageName: node
   linkType: hard
 
+"rimraf@npm:^3.0.2":
+  version: 3.0.2
+  resolution: "rimraf@npm:3.0.2"
+  dependencies:
+    glob: ^7.1.3
+  bin:
+    rimraf: bin.js
+  checksum: 87f4164e396f0171b0a3386cc1877a817f572148ee13a7e113b238e48e8a9f2f31d009a92ec38a591ff1567d9662c6b67fd8818a2dbbaed74bc26a87a2a4a9a0
+  languageName: node
+  linkType: hard
+
 "run-async@npm:^2.2.0":
   version: 2.4.1
   resolution: "run-async@npm:2.4.1"