Add Nil type check to ValueOf (#13)

Author: mFat7y

convert.go

@@ -90,7 +90,7 @@ func ValueOf(v any) Value {
 		return mapAsTable(v)
 	case []any:
 		return sliceAsArray(v)
-	case nil:
+	case nil, Nil:
 		return Nil{}
 	default:
 		out, err := json.Marshal(v)

convert_test.go

@@ -47,6 +47,8 @@ func TestValueOf(t *testing.T) {
 		{input: []float32{1, 2, 3}, output: Numbers{1, 2, 3}},
 		{input: []float64{1, 2, 3}, output: Numbers{1, 2, 3}},
 		{input: []bool{false, true}, output: Bools{false, true}},
+		{input: nil, output: Nil{}},
+		{input: Nil{}, output: Nil{}},
 		{input: map[string]any{
 			"A": "foo",
 			"B": "bar",