Set up CI/CD pipeline with GitHub Actions

- Add workflow for automated testing, linting, and npm deployment
- Update package.json with lint script
- Create .npmignore file
- Update .gitignore to exclude .npmrc

.github/workflows/ci-cd.yml

@@ -0,0 +1,50 @@
+name: CI/CD
+
+on:
+  push:
+    branches: [main]
+  pull_request:
+    branches: [main]
+
+jobs:
+  test:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v2
+      - name: Use Node.js
+        uses: actions/setup-node@v2
+        with:
+          node-version: '14.x'
+      - run: npm ci
+      - run: npm run build
+      - run: npm test
+
+  lint:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v2
+      - name: Use Node.js
+        uses: actions/setup-node@v2
+        with:
+          node-version: '14.x'
+      - run: npm ci
+      - run: npm run lint
+
+  deploy:
+    needs: [test, lint]
+    runs-on: ubuntu-latest
+    if: github.ref == 'refs/heads/main' && github.event_name == 'push'
+    steps:
+      - uses: actions/checkout@v2
+      - name: Use Node.js
+        uses: actions/setup-node@v2
+        with:
+          node-version: '14.x'
+      - run: npm ci
+      - run: npm run build
+      - name: Deploy to npm
+        run: |
+          echo "//registry.npmjs.org/:_authToken=${{ secrets.NPM_TOKEN }}" > ~/.npmrc
+          npm publish
+        env:
+          NPM_TOKEN: ${{ secrets.NPM_TOKEN }}

.gitignore

@@ -66,4 +66,6 @@ jspm_packages/
 .parcel-cache
 
 # Next.js build output
-.next
+.next
+
+.npmrc