Add option to recursively retrieve mod dependencies (#4)

* Add recursive option to Routes#GetModDependencies
* Move optional parameter higher up for compatibility.
---------
Co-authored-by: DarkEyeDragon <darkeyedragon@gmail.com>

Modio/Clients/DependenciesClient.cs

@@ -31,9 +31,9 @@ internal DependenciesClient(IConnection connection, uint game, uint mod) : base(
         /// <summary>
         /// Get all dependencies the mod has selected.
         /// </summary>
-        public async Task<IReadOnlyList<Dependency>> Get()
+        public async Task<IReadOnlyList<Dependency>> Get(bool recursive = false)
         {
-            var route = Routes.GetModDependencies(GameId, ModId);
+            var route = Routes.GetModDependencies(GameId, ModId, recursive);
             var search = new SearchClient<Dependency>(Connection, route, null);
             return await search.ToList();
         }

Modio/Http/Routes.cs

@@ -173,9 +173,9 @@ public static (HttpMethod, Uri) DeleteModMetadata(uint game, uint mod)
         #endregion
 
         #region Dependencies
-        public static (HttpMethod, Uri) GetModDependencies(uint game, uint mod)
+        public static (HttpMethod, Uri) GetModDependencies(uint game, uint mod, bool recursive)
         {
-            var uri = "games/{0}/mods/{1}/dependencies".FormatUri(game, mod);
+            var uri = "games/{0}/mods/{1}/dependencies?recursive={2}".FormatUri(game, mod, recursive);
             return (HttpMethod.Get, uri);
         }