fix(scripts): move depcheck to main dep so other apps can use it

Author: viviannguyen

package.json

@@ -67,6 +67,7 @@
     "cosmiconfig": "^7.0.1",
     "cross-env": "^7.0.3",
     "cross-spawn": "^7.0.3",
+    "depcheck": "^1.4.3",
     "doctoc": "^2.1.0",
     "eslint": "^8.16.0",
     "eslint-config-airbnb": "19.0.0",
@@ -131,7 +132,6 @@
     "@babel/preset-env": "^7.16.11",
     "@types/cross-spawn": "^6.0.2",
     "babel-jest": "^28.1.0",
-    "depcheck": "^1.4.3",
     "eslint-config-kentcdodds": "^20.0.1",
     "husky": "^7.0.4",
     "jest-in-case": "^1.0.2",