chore: update npm version script

Author: edusperoni

.npmrc

@@ -0,0 +1 @@
+message="release: %s"

package.json

@@ -26,7 +26,8 @@
     "build": "./build_all.sh",
     "setup-ci": "./build_metadata_generator.sh",
     "update-version": "./update_version.sh",
-    "changelog": "conventional-changelog -p angular -i CHANGELOG.md -s"
+    "changelog": "conventional-changelog -p angular -i CHANGELOG.md -s",
+    "version": "npm run changelog && git add CHANGELOG.md"
   },
   "license": "Apache-2.0",
   "devDependencies": {