Fixes all warnings

PkmnLib.Static/Utils/Random.cs

@@ -47,6 +47,9 @@ public interface IRandom
     /// </summary>
     public bool GetBool();
 
+    /// <summary>
+    /// Get a random element from the given list.
+    /// </summary>
     public T OneOf<T>(IReadOnlyList<T> list);
 }