Update CI

Author: NullVoxPopuli

.github/workflows/ci.yml

@@ -26,12 +26,10 @@ jobs:
       uses: actions/setup-node@v4
       with:
         node-version: ${{ matrix.node-version }}
-        cache: 'yarn'
+        cache: 'pnpm'
 
-    - run: yarn install --frozen-lockfile --non-interactive
+    - run: pnpm install
 
-    - run: yarn lint
+    - run: pnpm lint
 
-    - run: yarn update && git diff --exit-code
-
-    - run: yarn test:coverage --runInBand
+    - run: pnpm test:coverage --runInBand