ci(main.yml): added publish job with semantic release (#3)

This should force a publish to npm registry for this package with a semantic version

Author: Sreejit7

.github/workflows/main.yml

@@ -30,3 +30,33 @@ jobs:
 
       - name: Build
         run: yarn build
+
+  publish:
+    name: Publish to npm registry with semantic release
+
+    if: ${{ github.ref == 'refs/heads/main' }}
+    needs: [build]
+
+    runs-on: ${{ matrix.os }}
+    strategy:
+      matrix:
+        node: ['10.x', '12.x', '14.x']
+        os: [ubuntu-latest, windows-latest, macOS-latest]
+
+    steps:
+      - name: Checkout repo
+        uses: actions/checkout@v2
+
+      - name: Use Node ${{ matrix.node }}
+        uses: actions/setup-node@v1
+        with:
+          node-version: ${{ matrix.node }}
+
+      - name: Install deps and build (with cache)
+        uses: bahmutov/npm-install@v1
+
+      - name: Publish with Semantic Versioning
+        run: npm run semantic-release
+        env:
+          NPM_TOKEN: ${{ secrets.NPM_TOKEN }}
+          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}