chore(package.json): Update release scripts

Author: jspizziri

package.json

@@ -11,6 +11,9 @@
     "url": "https://github.com/jspizziri/sequelize-connect.git"
   },
   "scripts": {
+    "version": "npm run changelog && git add CHANGELOG.md",
+    "postversion": "git push && git push --tags",
+    "changelog": "conventional-changelog -p angular -i CHANGELOG.md -s -r 0",
     "commit": "git-cz"
   },
   "keywords": [