fix some error

Author: SimonCropp

GitVersionCore/ShortVersionParser.cs

@@ -25,8 +25,8 @@ public static bool TryParseMajorMinor(string versionString, out ShortVersion sho
 
         public static bool TryParse(string versionString, out ShortVersion shortVersion)
         {
-            var major = 0;
-            var minor = 0;
+            int major;
+            int minor;
             var patch = 0;
             var strings = versionString.Split('.');
             if (strings.Length < 2 || strings.Length > 3)

GitVersionTask.Tests/Mocks/MockReferenceCollection.cs

@@ -15,7 +15,7 @@ public override ReflogCollection Log(string canonicalName)
 
     public List<Commit> Commits = new List<Commit>();
 
-    public IEnumerator<Commit> GetEnumerator()
+    public new IEnumerator<Commit> GetEnumerator()
     {
         return Commits.GetEnumerator();
     }

GitVersionTask.Tests/Mocks/MockReflogCollection.cs

@@ -6,7 +6,7 @@ public class MockReflogCollection : ReflogCollection, ICollection<Commit>
 {
     public List<Commit> Commits = new List<Commit>();
 
-    public IEnumerator<Commit> GetEnumerator()
+    public new IEnumerator<Commit> GetEnumerator()
     {
         return Commits.GetEnumerator();
     }