refactor: universal folder, package.json

plugins/github-actions/package.json

@@ -51,6 +51,6 @@
   },
   "files": [
     "dist",
-    "universal.js"
+    "universal"
   ]
 }

plugins/github-actions/universal/index.js

@@ -1,3 +1,4 @@
+// @ts-check
 /*
  * Copyright 2020 Spotify AB
  *
@@ -14,5 +15,8 @@
  * limitations under the License.
  */
 
-// This file is shared between frontend and backend plugins
+/**
+ * Annotation to define on the entity to enable the plugin
+ * @type {string}
+ */
 module.exports.GITHUB_ACTIONS_ANNOTATION = 'github.com/project-slug';

plugins/github-actions/universal/package.json

@@ -0,0 +1,5 @@
+{
+  "main": "index.js",
+  "module": "index.js",
+  "description": "Provides code that can be shared between frontend- and backend-oriented packages"
+}