Prepare 2.17.0 (#11059)

Author: derrabus

Diff for: .doctrine-project.json

@@ -11,21 +11,23 @@
             "slug": "latest",
             "upcoming": true
         },
+        {
+            "name": "2.18",
+            "branchName": "2.18.x",
+            "slug": "2.18",
+            "upcoming": true
+        },
         {
             "name": "2.17",
             "branchName": "2.17.x",
             "slug": "2.17",
-            "upcoming": true
+            "current": true
         },
         {
             "name": "2.16",
             "branchName": "2.16.x",
             "slug": "2.16",
-            "current": true,
-            "aliases": [
-                "current",
-                "stable"
-            ]
+            "maintained": false
         },
         {
             "name": "2.15",