Update .doctrine-project.json for 2.15 (#2906)

* Update .doctrine-project.json
* Remove versions older than 2 years
* Remove docs for v1.3

Author: GromNaN

.doctrine-project.json

@@ -6,16 +6,27 @@
     "docsSlug": "doctrine-mongodb-odm",
     "versions": [
         {
-            "name": "2.15",
-            "branchName": "2.15.x",
+            "name": "3.0",
+            "branchName": "3.0.x",
+            "slug": "3.0",
+            "upcoming": true
+        },
+        {
+            "name": "2.16",
+            "branchName": "2.16.x",
             "slug": "latest",
             "upcoming": true
         },
+        {
+            "name": "2.15",
+            "branchName": "2.15.x",
+            "slug": "2.15",
+            "current": true
+        },
         {
             "name": "2.14",
-            "branchName": "2.14.x",
             "slug": "2.14",
-            "current": true
+            "maintained": false
         },
         {
             "name": "2.13",
@@ -56,57 +67,6 @@
             "name": "2.6",
             "slug": "2.6",
             "maintained": false
-        },
-        {
-            "name": "2.5",
-            "slug": "2.5",
-            "maintained": false
-        },
-        {
-            "name": "2.4",
-            "slug": "2.4",
-            "maintained": false
-        },
-        {
-            "name": "2.3",
-            "slug": "2.3",
-            "maintained": false
-        },
-        {
-            "name": "2.2",
-            "slug": "2.2",
-            "maintained": false
-        },
-        {
-            "name": "2.1",
-            "slug": "2.1",
-            "maintained": false
-        },
-        {
-            "name": "2.0",
-            "slug": "2.0",
-            "maintained": false
-        },
-        {
-            "name": "1.3",
-            "branchName": "1.3.x",
-            "slug": "1.3",
-            "maintained": false
-        },
-        {
-            "name": "1.2",
-            "slug": "1.2",
-            "maintained": false
-        },
-        {
-            "name": "1.1",
-            "slug": "1.1",
-            "maintained": false
-        },
-        {
-            "name": "1.0",
-            "slug": "1.0",
-            "maintained": false
         }
     ]
 }