chore: 🤖 add missing lerna.json reference

Author: Portugal

grunt/bump.js

@@ -2,7 +2,7 @@ module.exports = {
   options: {
     files: ['package.json', 'package-lock.json', 'bower.json'],
     commitFiles: [
-      'package.json', 'package-lock.json', 'bower.json', 'CHANGELOG.md',
+      'package.json', 'package-lock.json', 'bower.json', 'CHANGELOG.md', 'lerna.json',
       'packages/**/package.json', 'packages/**/package-lock.json', 'packages/**/CHANGELOG.md'
     ],
     push: false,