Added engine parameter to IObjectConverter.TryConvert for context (#331)

Jint.Tests/Runtime/Converters/EnumsToStringConverter.cs

@@ -6,7 +6,7 @@ namespace Jint.Tests.Runtime.Converters
 {
     public class EnumsToStringConverter : IObjectConverter
     {
-        public bool TryConvert(object value, out JsValue result)
+        public bool TryConvert(Engine engine, object value, out JsValue result)
         {
             if (value is Enum)
             {

Jint.Tests/Runtime/Converters/NegateBoolConverter.cs

@@ -5,11 +5,11 @@ namespace Jint.Tests.Runtime.Converters
 {
     public class NegateBoolConverter : IObjectConverter
     {
-        public bool TryConvert(object value, out JsValue result)
+        public bool TryConvert(Engine engine, object value, out JsValue result)
         {
-            if (value is bool)
+            if (value is bool b)
             {
-                result = !(bool) value;
+                result = !b;
                 return true;
             }
 

Jint/Native/JsValue.cs

@@ -290,7 +290,7 @@ namespace Jint.Native
             for (var i = 0; i < convertersCount; i++)
             {
                 var converter = converters[i];
-                if (converter.TryConvert(value, out var result))
+                if (converter.TryConvert(engine, value, out var result))
                 {
                     return result;
                 }

Jint/Runtime/Interop/IObjectConverter.cs

@@ -7,6 +7,6 @@ namespace Jint.Runtime.Interop
     /// </summary>
     public interface IObjectConverter
     {
-        bool TryConvert(object value, out JsValue result);
+        bool TryConvert(Engine engine, object value, out JsValue result);
     }
 }