infra: add npm release workflow for adding github release (#16)

Author: dev99problems

.github/workflows/release.yml

@@ -0,0 +1,21 @@
+name: Release
+on:
+  release:
+    types: [created]
+
+jobs:
+  build:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v2
+        
+      - name: Setup node.js v14.x 
+        uses: actions/setup-node@v2
+        with:
+          node-version: '14'
+          registry-url: https://registry.npmjs.org/
+      - run: yarn
+      - run: yarn test:cov
+      - run: npm publish --access public
+        env:
+          NODE_AUTH_TOKEN: ${{secrets.NPM_TOKEN}}