Update .doctrine-project.json

Author: franmomu

.doctrine-project.json

@@ -6,22 +6,28 @@
     "docsSlug": "doctrine-mongodb-odm",
     "versions": [
         {
-            "name": "2.3",
-            "branchName": "2.3.x",
+            "name": "2.4",
+            "branchName": "2.4.x",
             "slug": "latest",
             "upcoming": true
         },
         {
-            "name": "2.2",
-            "branchName": "2.2.x",
-            "slug": "2.2",
+            "name": "2.3",
+            "branchName": "2.3.x",
+            "slug": "2.3",
             "current": true,
             "aliases": [
                 "current",
                 "stable",
-                "2.2.x"
+                "2.3.x"
             ]
         },
+        {
+            "name": "2.2",
+            "branchName": "2.2.x",
+            "slug": "2.2",
+            "maintained": false
+        },
         {
             "name": "2.1",
             "branchName": "2.1.x",