Add per_page support for EventQuery (#36)

Author: Toa741

NGitLab/Impl/EventClient.cs

@@ -16,14 +16,15 @@ public EventClient(API api, string baseUrl)
 
         public IEnumerable<Event> Get(EventQuery query)
         {
-            string url = _baseUrl;
+            var url = _baseUrl;
 
             url = Utils.AddParameter(url, "action", query.Action);
             url = Utils.AddParameter(url, "target_type", query.Type);
             url = Utils.AddParameter(url, "before", query.Before?.Date);
             url = Utils.AddParameter(url, "after", query.After?.Date);
             url = Utils.AddParameter(url, "scope", query.Scope);
             url = Utils.AddParameter(url, "sort", query.Sort);
+            url = Utils.AddParameter(url, "per_page", query.PerPage);
 
             return _api.Get().GetAll<Event>(url);
         }

NGitLab/Models/EventQuery.cs

@@ -38,5 +38,10 @@ public class EventQuery
         /// Sort events in asc or desc order by created_at. Default is desc
         /// </summary>
         public string Sort { get; set; }
+
+        /// <summary>
+        /// Specifies how many records per page (GitLab supports a maximum of 100 items per page and defaults to 20).
+        /// </summary>
+        public int? PerPage { get; set; }
     }
 }