[unity] Fixed warnings about obsolete prefab method calls (missing #if branch for Unity 2018.4). Closes #1428.

spine-unity/Assets/Spine/Editor/spine-unity/Editor/Components/BoundingBoxFollowerInspector.cs

@@ -27,7 +27,7 @@
  * EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  *****************************************************************************/
 
-#if UNITY_2018_3 || UNITY_2019
+#if UNITY_2018_3 || UNITY_2019 || UNITY_2018_3_OR_NEWER
 #define NEW_PREFAB_SYSTEM
 #endif
 

spine-unity/Assets/Spine/Editor/spine-unity/Editor/Components/SkeletonRendererInspector.cs

@@ -27,7 +27,7 @@
  * EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  *****************************************************************************/
 
-#if UNITY_2018_3 || UNITY_2019
+#if UNITY_2018_3 || UNITY_2019 || UNITY_2018_3_OR_NEWER
 #define NEW_PREFAB_SYSTEM
 #else
 #define NO_PREFAB_MESH

spine-unity/Assets/Spine/Editor/spine-unity/Editor/Components/SkeletonUtilityInspector.cs

@@ -27,7 +27,7 @@
  * EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  *****************************************************************************/
 
-#if UNITY_2018_3 || UNITY_2019
+#if UNITY_2018_3 || UNITY_2019 || UNITY_2018_3_OR_NEWER
 #define NEW_PREFAB_SYSTEM
 #endif
 

spine-unity/Assets/Spine/Editor/spine-unity/Editor/Windows/SkeletonBaker.cs

@@ -27,7 +27,7 @@
  * EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  *****************************************************************************/
 
-#if UNITY_2018_3 || UNITY_2019
+#if UNITY_2018_3 || UNITY_2019 || UNITY_2018_3_OR_NEWER
 #define NEW_PREFAB_SYSTEM
 #endif
 

spine-unity/Assets/Spine/Editor/spine-unity/Editor/Windows/SkeletonBakingWindow.cs

@@ -27,7 +27,7 @@
  * EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  *****************************************************************************/
 
-#if UNITY_2018_3 || UNITY_2019
+#if UNITY_2018_3 || UNITY_2019 || UNITY_2018_3_OR_NEWER
 #define NEW_PREFAB_SYSTEM
 #endif
 

spine-unity/Assets/Spine/Editor/spine-unity/Editor/Windows/SkeletonDebugWindow.cs

@@ -29,7 +29,7 @@
 
 // With contributions from: Mitch Thompson
 
-#if UNITY_2018_3 || UNITY_2019
+#if UNITY_2018_3 || UNITY_2019 || UNITY_2018_3_OR_NEWER
 #define NEW_PREFAB_SYSTEM
 #else
 #define NO_PREFAB_MESH

spine-unity/Assets/Spine/Runtime/spine-unity/Components/Following/BoneFollower.cs

@@ -27,7 +27,7 @@
  * EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  *****************************************************************************/
 
-#if UNITY_2018_3 || UNITY_2019
+#if UNITY_2018_3 || UNITY_2019 || UNITY_2018_3_OR_NEWER
 #define NEW_PREFAB_SYSTEM
 #endif