restore composer.json, add mysqli extension

public/vendor/editor/config/common/lang.config.js

@@ -0,0 +1,14 @@
+const testFolder = './lang/';
+const fs = require('fs');
+
+const files = fs.readdirSync(testFolder);
+
+let entries = {};
+
+files.forEach(file => {
+  const key = file.split('.')[0];
+
+  entries[key] = `./lang/${file}`;
+});
+
+module.exports = entries;