Add IgnoreCase option to ProxyUrlReplaceSettings (#925)

* Add IgnoreCase option to ProxyUrlReplaceSettings

* fix

src/WireMock.Net/Settings/ProxyUrlReplaceSettings.cs

@@ -14,4 +14,9 @@ public class ProxyUrlReplaceSettings
     /// The new path value to replace the old value with
     /// </summary>
     public string NewValue { get; set; } = null!;
+
+    /// <summary>
+    /// Defines if the case should be ignore when replacing.
+    /// </summary>
+    public bool IgnoreCase { get; set; }
 }