ci: add semantic release configuration

This will avoid the NPM publication.

Author: e0ipso

release.config.js

@@ -2,5 +2,9 @@ module.exports = {
   branches: ['master'],
   analyzeCommits: 'semantic-release-conventional-commits',
   repositoryUrl: 'https://github.com/js-widgets/example-widget.git',
-  plugins: ['@semantic-release/commit-analyzer', '@semantic-release/github'],
+  plugins: [
+    '@semantic-release/commit-analyzer',
+    '@semantic-release/release-notes-generator',
+    '@semantic-release/github',
+  ],
 };