bump version

build/UmbracoVersion.txt

@@ -1,2 +1,2 @@
 # Usage: on line 2 put the release version, on line 3 put the version comment (example: beta)
-7.2.0
+7.2.1

src/Umbraco.Core/Configuration/UmbracoVersion.cs

@@ -5,7 +5,7 @@ namespace Umbraco.Core.Configuration
 {
     public class UmbracoVersion
     {
-        private static readonly Version Version = new Version("7.2.0");
+        private static readonly Version Version = new Version("7.2.1");
 
         /// <summary>
         /// Gets the current version of Umbraco.