ci: update node

.github/actions/setup-and-cache/action.yml

@@ -5,7 +5,7 @@ inputs:
     node-version:
         required: false
         description: 'Node version for setup-node'
-        default: '18'
+        default: '20'
 runs:
     using: 'composite'
     steps:

.github/workflows/all-plugins.yml

@@ -9,5 +9,5 @@ jobs:
             - uses: actions/checkout@v4
             - uses: actions/setup-node@v4
               with:
-                  node-version: 18
+                  node-version: 20
             - run: 'echo done'

.github/workflows/check-for-private-repositories.yml

@@ -9,7 +9,7 @@ jobs:
             - uses: actions/checkout@v4
             - uses: actions/setup-node@v4
               with:
-                  node-version: 18
+                  node-version: 20
             - run: |
                   yarn install
                   yarn build

.github/workflows/ci.yml

@@ -31,7 +31,7 @@ jobs:
         runs-on: ubuntu-latest
         strategy:
             matrix:
-                node-version: [16, 18]
+                node-version: [18, 20]
         steps:
             - uses: actions/checkout@v4
             - uses: ./.github/actions/setup-and-cache
@@ -50,7 +50,7 @@ jobs:
         runs-on: ubuntu-latest
         strategy:
             matrix:
-                node-version: [16, 18]
+                node-version: [18, 20]
         steps:
             - uses: actions/checkout@v4
             - uses: ./.github/actions/setup-and-cache
@@ -69,7 +69,7 @@ jobs:
         runs-on: ubuntu-latest
         strategy:
             matrix:
-                node-version: [16, 18]
+                node-version: [18, 20]
         steps:
             - uses: actions/checkout@v4
             - uses: ./.github/actions/setup-and-cache
@@ -88,7 +88,7 @@ jobs:
         runs-on: ubuntu-latest
         strategy:
             matrix:
-                node-version: [16, 18]
+                node-version: [18, 20]
         steps:
             - uses: actions/checkout@v4
             - uses: ./.github/actions/setup-and-cache

.github/workflows/publish-eslint-remote-tester-repositories.yml

@@ -9,7 +9,7 @@ jobs:
             - uses: actions/checkout@v4
             - uses: actions/setup-node@v4
               with:
-                  node-version: 18
+                  node-version: 20
             - run: yarn install
               name: Install eslint-remote-tester
             - run: yarn install

.github/workflows/publish-eslint-remote-tester.yml

@@ -18,7 +18,7 @@ jobs:
             - uses: actions/checkout@v4
             - uses: actions/setup-node@v4
               with:
-                  node-version: '18'
+                  node-version: '20'
                   registry-url: 'https://registry.npmjs.org'
 
             - name: Install