Update linters

Author: sethvargo

.github/workflows/unit.yml

@@ -31,16 +31,10 @@ jobs:
 
       - uses: 'actions/setup-node@1d0ff469b7ec7b3cb9d8673fde0c81c44821de2a' # ratchet:actions/setup-node@v4
         with:
-          node-version: '20.x'
+          node-version-file: 'package.json'
 
       - name: 'npm build'
         run: 'npm ci && npm run build'
 
-      - name: 'npm lint'
-        # There's no need to run the linter for each operating system, since it
-        # will find the same thing 3x and clog up the PR review.
-        if: ${{ matrix.os == 'ubuntu-latest' }}
-        run: 'npm run lint'
-
       - name: 'npm test'
         run: 'npm run test'

package.json

@@ -9,6 +9,10 @@
     "format": "eslint . --fix",
     "test": "bash ./bin/runTests.sh"
   },
+  "engines": {
+    "node": "20.x",
+    "npm": "10.x"
+  },
   "repository": {
     "type": "git",
     "url": "https://github.com/google-github-actions/ssh-compute.git"