Update module version to 1.1.0 and enhance Merge-DSCConfigurationData function to prevent modifications to sealed parameters

Tests/Extends.Tests.ps1

@@ -347,4 +347,63 @@ Describe 'Merge-DSCConfigurationData Extends' {
         $Validation.IsStale | Should Be $true
         @($Validation.Issues | Where-Object { $_.Code -eq 'SourceChanged' }).Count | Should Be 1
     }
+
+    It 'prevents overriding a sealed parameter definition' {
+        $Template = @{
+            Parameters = @{
+                DomainNetBIOS = @{
+                    Type = 'string'
+                    Value = 'CONTOSO'
+                    Sealed = $true
+                }
+            }
+        }
+
+        $Deployment = @{
+            Parameters = @{
+                DomainNetBIOS = @{
+                    Value = 'OTHER'
+                }
+            }
+        }
+
+        { Merge-DSCConfigurationData -Template $Template -Deployment $Deployment } | Should Throw
+    }
+
+    It 'prevents adding values below a sealed resource tree' {
+        $Template = @{
+            Resources = @{
+                NonNodeData = @{
+                    Services = @{
+                        SharePoint = @{
+                            Farm = @{
+                                ManagedAccounts = @{
+                                    Sealed = $true
+                                    FarmAccount = "[parameters('FarmCredential')]"
+                                }
+                            }
+                        }
+                    }
+                }
+            }
+        }
+
+        $Deployment = @{
+            Resources = @{
+                NonNodeData = @{
+                    Services = @{
+                        SharePoint = @{
+                            Farm = @{
+                                ManagedAccounts = @{
+                                    SearchAccount = "[parameters('SearchCredential')]"
+                                }
+                            }
+                        }
+                    }
+                }
+            }
+        }
+
+        { Merge-DSCConfigurationData -Template $Template -Deployment $Deployment } | Should Throw
+    }
 }