Implements accuracy/evasion

PkmnLib.Dynamic/ScriptHandling/Registry/ScriptRegistry.cs

@@ -43,9 +43,10 @@ public class ScriptRegistry
         if (type == null)
             throw new ArgumentNullException(nameof(type));
 
-        var constructor = type.GetConstructor(Type.EmptyTypes);
+        var constructor = type.GetConstructor(BindingFlags.Public | BindingFlags.NonPublic | BindingFlags.Instance,
+            null, Type.EmptyTypes, null);
         if (constructor == null)
-            throw new ArgumentException("The type must have a parameterless constructor.");
+            throw new ArgumentException($"Type {type} does not have a parameterless constructor.");
 
         // We create a lambda that creates a new instance of the script type.
         // This is more performant than using Activator.CreateInstance.

PkmnLib.Dynamic/ScriptHandling/Script.cs

@@ -207,7 +207,7 @@ public abstract class Script
     /// This function allows a script to modify the accuracy of a move used. This value represents
     /// the percentage accuracy, so anything above 100% will make it always hit.
     /// </summary>
-    public virtual void ChangeAccuracy(IExecutingMove move, IPokemon target, byte hit, ref byte accuracy)
+    public virtual void ChangeAccuracyModifier(IExecutingMove move, IPokemon target, byte hit, ref float modifier)
     {
     }