Add publish ci (#175)

.github/workflows/npm-publish.yml

@@ -0,0 +1,23 @@
+name: NPM publish
+
+on:
+  release:
+    types: [released]
+
+jobs:
+  build:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v3
+      - uses: actions/setup-node@v3
+        with:
+          node-version: '14.x'
+          registry-url: 'https://registry.npmjs.org'
+      - run: |
+          sudo apt-get update
+          sudo apt-get install -y graphicsmagick ghostscript
+      - run: npm install
+      - run: npm run build
+      - run: npm publish
+        env:
+          NODE_AUTH_TOKEN: ${{ secrets.NPM_TOKEN }}

package.json

@@ -1,6 +1,6 @@
 {
   "name": "pdf2pic",
-  "version": "2.2.1",
+  "version": "2.2.4",
   "description": "A utility for converting pdf to image and base64 format.",
   "main": "dist/index.js",
   "types": "dist/index.d.ts",