Initial pnpm migration

Author: polarker

.github/workflows/test.yml

@@ -19,7 +19,7 @@ jobs:
         uses: actions/setup-node@v3
         with:
           node-version: ${{ matrix.node-version }}
-      - run: npm ci
+      - run: pnpm install
       - run: npm run build
       - run: npm run lint
       - run: npm run audit

.npmrc

@@ -0,0 +1 @@
+auto-install-peers = true