update dependencies, use npm, run typecheck, mark as sideeffect free

Author: threepointone

.github/workflows/tests.yml

@@ -11,18 +11,20 @@ jobs:
     runs-on: ubuntu-latest
 
     steps:
-    - uses: actions/checkout@v4
-    - name: Install pnpm
-      uses: pnpm/action-setup@v4
-      with:
-        version: 10
-    - name: Use Node.js ${{ matrix.node-version }}
-      uses: actions/setup-node@v4
-      with:
-        node-version: ${{ matrix.node-version }}
-        cache: 'pnpm'
-    - name: Install dependencies
-      run: pnpm install
-    
-    - name: Run tests
-      run: npm test
+      - uses: actions/checkout@v4
+        with:
+            fetch-depth: 1
+
+      - uses: actions/setup-node@v4
+        with:
+          node-version: 20
+          cache: "npm"      
+      
+      - name: Install dependencies
+        run: npm install
+
+      - name: Type check
+        run: npm run typecheck
+
+      - name: Run tests
+        run: npm test