Use base type for argument

Octokit/Exceptions/ApiValidationException.cs

@@ -48,7 +48,7 @@ namespace Octokit
         /// Constructs an instance of ApiValidationException
         /// </summary>
         /// <param name="innerException">The inner exception</param>
-        protected ApiValidationException(ApiValidationException innerException)
+        protected ApiValidationException(ApiException innerException)
             : base(innerException)
         {
         }

Octokit/Models/Request/NewAuthorization.cs

@@ -16,13 +16,13 @@ namespace Octokit
         {
         }
 
-        public NewAuthorization(string note, string[] scopes)
+        public NewAuthorization(string note, IEnumerable<string> scopes)
         {
             Scopes = scopes;
             Note = note;
         }
 
-        public NewAuthorization(string note, string[] scopes, string fingerprint)
+        public NewAuthorization(string note, IEnumerable<string> scopes, string fingerprint)
         {
             Scopes = scopes;
             Note = note;

Octokit/Models/Request/NewRepositoryHook.cs

@@ -9,7 +9,7 @@ namespace Octokit
     [DebuggerDisplay("{DebuggerDisplay,nq}")]
     public class NewRepositoryHook
     {
-        public NewRepositoryHook(string name, Dictionary<string, string> config)
+        public NewRepositoryHook(string name, IReadOnlyDictionary<string, string> config)
         {
             Name = name;
             Config = config;