ci: run tests against node v20

Author: danielroe

.github/workflows/test.yml

@@ -24,7 +24,7 @@ jobs:
 
       - uses: actions/setup-node@v3
         with:
-          node-version: 18
+          node-version: 20
           cache: "pnpm"
 
       - name: Install dependencies
@@ -50,7 +50,7 @@ jobs:
 
       - uses: actions/setup-node@v3
         with:
-          node-version: 18
+          node-version: 20
           cache: "pnpm"
 
       - name: Install dependencies