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'