Update CI (bump ubuntu, node and actions versions)

.github/workflows/tests.yml

@@ -4,17 +4,17 @@ on: [push, pull_request]
 
 jobs:
   build:
-    runs-on: ubuntu-20.04
+    runs-on: ubuntu-latest
 
     strategy:
       matrix:
-        node-version: [16]
+        node-version: [18]
 
     steps:
-      - uses: actions/checkout@v1
+      - uses: actions/checkout@v4
 
       - name: Use Node.js ${{ matrix.node-version }}
-        uses: actions/setup-node@v1
+        uses: actions/setup-node@v4
         with:
           node-version: ${{ matrix.node-version }}
 
@@ -24,10 +24,10 @@ jobs:
           echo "npm version $(npm -v) running"
 
       - name: Install dependencies
-        run: npm ci
+        run: yarn
 
       - name: "Unit tests"
-        run: "npm run test"
+        run: "yarn test"
 
       - name: "Build"
-        run: "npm run build"
+        run: "yarn build"