Add Minimal to the DiffAlgorithm enum

Author: Tom Smith

LibGit2Sharp/DiffAlgorithm.cs

@@ -10,6 +10,11 @@ public enum DiffAlgorithm
         /// </summary>
         Meyers = 0,
 
+        /// <summary>
+        /// Use "minimal diff" algorithm when generating patches.
+        /// </summary>
+        Minimal = 1,
+
         /// <summary>
         /// Use "patience diff" algorithm when generating patches.
         /// </summary>