Disabling update if the module is disabled in the Unity editor; (#413)

Added this check to avoid un-needed asset database searches on UpdateAssetsWithBuildTargets(EditorUserBuildSettings.activeBuildTarget); This commit solve perfomance issues when working on big projects.

Author: felipegodias

source/VersionHandlerImpl/src/VersionHandlerImpl.cs

@@ -2307,6 +2307,11 @@ static VersionHandlerImpl() {
     }
 
     static void UpdateVersionedAssetsOnUpdate() {
+        // Skips update if this module is disabled.
+        if (!Enabled) {
+            return;
+        }
+        
         UpdateVersionedAssets();
         NotifyWhenCompliationComplete(false);
         UpdateAssetsWithBuildTargets(EditorUserBuildSettings.activeBuildTarget);