Update actions/setup-node action to v4

Author: renovate[bot]

.github/workflows/continuous-integration.yml

@@ -24,7 +24,7 @@ jobs:
             ${{ runner.os }}-node-
 
       - name: Setup node
-        uses: actions/setup-node@v2
+        uses: actions/setup-node@v4
         with:
           node-version: ${{ matrix.node }}
 
@@ -54,7 +54,7 @@ jobs:
             ${{ runner.os }}-node-
 
       - name: Setup node
-        uses: actions/setup-node@v2
+        uses: actions/setup-node@v4
         with:
           node-version: 14