Change DefaultHumanizer class to public

Author: SonOfSardaar

src/TestStack.BDDfy/DefaultHumanizer.cs

@@ -7,7 +7,7 @@
 
 namespace TestStack.BDDfy
 {
-    internal partial class DefaultHumanizer: IHumanizer
+    public partial class DefaultHumanizer: IHumanizer
     {
         static readonly Func<string, string> FromUnderscoreSeparatedWords = methodName => string.Join(" ", methodName.Split(new[] { '_' }));
         static string FromPascalCase(string name)
@@ -78,4 +78,4 @@ public string Humanize(string input)
         [GeneratedRegex("__([a-zA-Z][a-zA-Z0-9]*)__")]
         private static partial Regex TitleCleanerRegex();
     }
-}
+}