fix: Bumped minimum Unity version supported to 2021.3 LTS (#2632)

* Bumped minimum Unity version supported to 2021.3 LTS

* temporarily adding a dummy date in the changelog to see if CI passes

* Revert "temporarily adding a dummy date in the changelog to see if CI passes"

This reverts commit 16b394e.

Author: fluong6

.yamato/project.metafile

@@ -1,4 +1,4 @@
-validation_editor: 2020.3
+validation_editor: 2021.3
 mobile_validation_editor: 2021.3
 
 # Platforms that will be tested. The first entry in this array will also
@@ -42,7 +42,6 @@ projects:
       - name: com.unity.netcode.gameobjects
         path: com.unity.netcode.gameobjects
     test_editors:
-      - 2020.3
       - 2021.3
       - 2022.2
       - 2023.1
@@ -56,7 +55,7 @@ projects:
       - name: com.unity.netcode.gameobjects
         path: com.unity.netcode.gameobjects
     test_editors:
-      - 2020.3
+      - 2021.3
   - name: testproject-tools-integration
     path: testproject-tools-integration
     validate: false

com.unity.netcode.gameobjects/CHANGELOG.md

@@ -84,7 +84,7 @@ Additional documentation and release notes are available at [Multiplayer Documen
 ### Added
 
 ### Fixed
-
+- Bumped minimum Unity version supported to 2021.3 LTS
 - Fixed issue where `NetworkClient.OwnedObjects` was not returning any owned objects due to the `NetworkClient.IsConnected` not being properly set. (#2631)
 - Fixed a crash when calling TrySetParent with a null Transform (#2625)
 - Fixed issue where a `NetworkTransform` using full precision state updates was losing transform state updates when interpolation was enabled. (#2624)

com.unity.netcode.gameobjects/Documentation~/index.md

@@ -16,7 +16,7 @@ See guides below to install Unity Netcode for GameObjects, set up your project,
 ## Requirements
 
 Netcode for GameObjects targets the following Unity versions:
-- Unity 2020.3, 2021.1, 2021.2 and 2021.3
+- Unity 2021.3 (LTS), 2022.3 (LTS) and 2023.2
 
 On the following runtime platforms:
 - Windows, MacOS, and Linux

com.unity.netcode.gameobjects/package.json

@@ -3,7 +3,7 @@
     "displayName": "Netcode for GameObjects",
     "description": "Netcode for GameObjects is a high-level netcode SDK that provides networking capabilities to GameObject/MonoBehaviour workflows within Unity and sits on top of underlying transport layer.",
     "version": "1.7.0",
-    "unity": "2020.3",
+    "unity": "2021.3",
     "dependencies": {
         "com.unity.nuget.mono-cecil": "1.10.1",
         "com.unity.transport": "1.4.0"