chore(ci): switch CI workflow from pnpm to npm

Author: dean-journeyapps

.github/workflows/ci.yml

@@ -1,4 +1,5 @@
 name: CI
+
 on:
   push:
     branches: [main]
@@ -10,20 +11,23 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - uses: actions/checkout@v4
+
       - uses: actions/setup-node@v4
         with:
           node-version: '18'
-          cache: 'pnpm'
-      - uses: pnpm/action-setup@v2
-        with:
-          version: 8
+          cache: 'npm'
+
       - name: Install dependencies
-        run: pnpm install --frozen-lockfile
+        run: npm ci
+
       - name: Run linting
-        run: pnpm run lint
+        run: npm run lint
+
       - name: Run type checking
-        run: pnpm run type-check
+        run: npm run type-check
+
       - name: Run tests
-        run: pnpm test
+        run: npm test
+
       - name: Run build
-        run: pnpm run build
+        run: npm run build