Fix failing tests by introducing versioning.

Author: AswinRajGopal

Assets/Tests/InputSystem/CoreTests_Actions.cs

@@ -5215,8 +5215,8 @@ public void Actions_CanConvertAssetToAndFromJson()
     static string MinimalJson(string name = null)
     {
         if (name != null)
-            return "{\n    \"name\": \"" + name + "\",\n    \"maps\": [],\n    \"controlSchemes\": []\n}";
-        return "{\n    \"maps\": [],\n    \"controlSchemes\": []\n}";
+            return "{\n    \"version\": 0,\n    \"name\": \"" + name + "\",\n    \"maps\": [],\n    \"controlSchemes\": []\n}";
+        return "{\n    \"version\": 0,\n    \"maps\": [],\n    \"controlSchemes\": []\n}";
     }
 
     [Test]

Packages/com.unity.inputsystem/InputSystem/Plugins/PlayerInput/DefaultInputActions.cs

@@ -42,6 +42,7 @@ public class DefaultInputActions : IInputActionCollection2, IDisposable
         public @DefaultInputActions()
         {
             asset = InputActionAsset.FromJson(@"{
+    ""version"": 1,
     ""name"": ""DefaultInputActions"",
     ""maps"": [
         {

Packages/com.unity.inputsystem/InputSystem/Plugins/PlayerInput/DefaultInputActions.inputactions

@@ -1,4 +1,5 @@
 {
+    "version": 1,
     "name": "DefaultInputActions",
     "maps": [
         {