update version in AzPreview.psd1

Author: VeryEarly

tools/AzPreview/AzPreview.psd1

@@ -93,7 +93,7 @@ RequiredModules = @(@{ModuleName = 'Az.Accounts'; ModuleVersion = '2.8.0'; },
             @{ModuleName = 'Az.DataLakeAnalytics'; RequiredVersion = '1.0.2'; }, 
             @{ModuleName = 'Az.DataLakeStore'; RequiredVersion = '1.3.0'; }, 
             @{ModuleName = 'Az.DataMigration'; RequiredVersion = '0.11.0'; }, 
-            @{ModuleName = 'Az.DataProtection'; RequiredVersion = '0.3.1'; }, 
+            @{ModuleName = 'Az.DataProtection'; RequiredVersion = '0.4.0'; }, 
             @{ModuleName = 'Az.DataShare'; RequiredVersion = '1.0.1'; }, 
             @{ModuleName = 'Az.DedicatedHsm'; RequiredVersion = '0.3.0'; }, 
             @{ModuleName = 'Az.DeploymentManager'; RequiredVersion = '1.1.0'; },