deps(ci): update actions to v4 and node to 20

Author: Nerixyz

.github/workflows/ci.yml

@@ -7,15 +7,15 @@ on:
     branches: [master]
 
 env:
-  NODE_VERSION: 16
+  NODE_VERSION: 20
 
 jobs:
   test:
     name: Test
     runs-on: ubuntu-latest
     steps:
       - name: Checkout
-        uses: actions/checkout@v3
+        uses: actions/checkout@v4
       - name: prettier --version
         uses: ./
         with:
@@ -37,9 +37,9 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - name: Checkout
-        uses: actions/checkout@v3
+        uses: actions/checkout@v4
       - name: Setup Node.js ${{ env.NODE_VERSION }}
-        uses: actions/setup-node@v3
+        uses: actions/setup-node@v4
         with:
           node-version: ${{ env.NODE_VERSION }}
           cache: yarn