replace yarn with npm across repo

.github/workflows/nodejs-ci.yml

@@ -14,13 +14,14 @@ jobs:
         uses: actions/setup-node@v3
         with:
           node-version: 18
-          cache: 'yarn'
+          cache: 'npm'
 
       - name: Install dependencies
-        run: yarn install
+        run: npm install
 
       - name: Run lint
-        run: yarn lint
+        run: npm run lint
 
       - name: Run tests
-        run: yarn test --silent
+        run: npm run test --silent
+

CONTRIBUTING.md

@@ -64,7 +64,7 @@ Add and commit:
 
 Commit your changes in logical chunks. Please do not push all changes in one commit.
 
-> Run `yarn fix` before commiting for not having conflict with CI linter.
+> Run `npm run fix` before commiting for not having conflict with CI linter.
 
 Please adhere to these [Commit message guidelines](#commit-message-guidelines)
    or your code is unlikely be merged into the main project.

package.json

@@ -38,9 +38,8 @@
     "zod": "^3.22.4"
   },
   "engines": {
-    "node": "18",
-    "yarn": ">=1.22",
-    "npm": "8.19.2"
+    "node": ">=18",
+    "npm": ">=8"
   },
   "files": [
     "build"
@@ -68,7 +67,8 @@
     "coverage": "jest --verbose --coverage",
     "fix:package": "fixpack",
     "lint": "gts lint",
-    "prepublish": "yarn build",
+    "prepublish": "npm run build",
     "test": "jest --verbose"
   }
 }
+