Add forgotten composer.

composer.json

+{
+  "name": "drupal/swiper_formatter",
+  "description": "Integration of Swiper as a configuration entity, with a couple of field formatters and views style.",
+  "type": "drupal-module",
+  "homepage": "https://www.drupal.org/project/swiper_formatter",
+  "authors": [
+    {
+      "name": "nk_",
+      "homepage": "https://www.drupal.org/u/nk_",
+      "role": "Maintainer"
+    }
+  ],
+    
+  "license": "GPL-2.0-or-later",
+  "minimum-stability": "dev",
+  "require": {
+    "drupal/core": "^8.8 || ^9"
+  },
+  "support": {
+    "issues": "https://www.drupal.org/project/issues/swiper_formatter",
+    "source": "https://git.drupalcode.org/project/swiper_formatter"
+  }
+}

swiper_formatter.info.yml

 name: Swiper formatter
 type: module
-description: 'Integration of Swiper.js as a configuration entity, with a field formatter and views style.'
+description: 'Integration of Swiper as a configuration entity, with a couple of field formatters and views style.'
 package: 'Other'
 core_version_requirement: ^8.8 || ^9