Add release script

Author: janniks

package.json

@@ -18,6 +18,8 @@
     "build:es": "cross-env NODE_ENV=production rollup --config build/rollup.config.js --format es",
     "build:postcss": "cross-env NODE_ENV=production rollup --config build/rollup.config.js --format postcss",
     "build:unpkg": "cross-env NODE_ENV=production rollup --config build/rollup.config.js --format iife",
+    "release:patch": "npm version patch && npm publish",
+    "postpublish": "cd example && npm install vue-notion@latest && git add --all && git commit -m 'Bump version' && git push && git push --tags",
     "prepare": "rm -rf dist && npm run build"
   },
   "dependencies": {