chore(ci): update GitHub Actions and source Node version from .nvmrc

.github/actions/setup-node/action.yml

@@ -1,19 +1,13 @@
 name: Setup
 description: Sets up Node and installs dependencies
 
-inputs:
-  node-version:
-    description: 'Specify Node version'
-    required: false
-    default: '24'
-
 runs:
   using: 'composite'
   steps:
     - name: Setup Node
       uses: actions/setup-node@v6
       with:
-        node-version: ${{ inputs.node-version }}
+        node-version-file: '.nvmrc'
 
     - name: Set NODE_VERSION env
       shell: bash

.github/workflows/ci.yml

@@ -49,7 +49,7 @@ jobs:
         run: yarn coverage
 
       - name: Upload coverage to Codecov
-        uses: codecov/codecov-action@v5
+        uses: codecov/codecov-action@v6
         with:
           verbose: true
           token: ${{ secrets.CODECOV_TOKEN }}

.github/workflows/size.yml

@@ -16,10 +16,12 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - uses: actions/checkout@v6
+      - uses: actions/setup-node@v6
+        with:
+          node-version-file: '.nvmrc'
       - uses: preactjs/compressed-size-action@v2
         env:
           NODE_OPTIONS: --max_old_space_size=4096
-          YARN_IGNORE_ENGINES: 'true' # skip validation for node20 requirement
         with:
           repo-token: '${{ secrets.GITHUB_TOKEN }}'
           pattern: './dist/**/*.{?(c|m)js,css,json}'