unified all tests

Applied the same technique that I applied in polkadot-fellows/runtimes#192 to have one final test job (and only depend this one)

.github/workflows/javascript-test.yml

@@ -3,41 +3,26 @@ name: Continuous testing
 on: [pull_request]
 
 jobs:
-  lint:
-    runs-on: ubuntu-latest
-    steps:
-      - uses: actions/checkout@v3
-      - name: Use node 18
-        uses: actions/setup-node@v3
-        with:
-          node-version: 18
-      - uses: c-hive/gha-yarn-cache@v2
-      - name: Install dependencies
-        run: yarn install --frozen-lockfile
-      - run: yarn run lint
-
-  build:
+  test:
+    strategy:
+      matrix:
+        command: [lint, build, test]
     runs-on: ubuntu-latest
+    name: running ${{ matrix.command }}
     steps:
       - uses: actions/checkout@v3
       - name: Use node 18
         uses: actions/setup-node@v3
         with:
-          node-version: 18
+          node-version: 20
       - uses: c-hive/gha-yarn-cache@v2
       - name: Install dependencies
         run: yarn install --frozen-lockfile
-      - run: yarn run build
+      - run: yarn run ${{ matrix.command }}
 
-  test:
+  conclude:
     runs-on: ubuntu-latest
+    name: All tests passed
+    needs: [test]
     steps:
-      - uses: actions/checkout@v3
-      - name: Use node 18
-        uses: actions/setup-node@v3
-        with:
-          node-version: 18
-      - uses: c-hive/gha-yarn-cache@v2
-      - name: Install dependencies
-        run: yarn install --frozen-lockfile
-      - run: yarn run test
+      - run: echo '### Good job! All the tests passed 🚀' >> $GITHUB_STEP_SUMMARY