fix: Remove js.Wrapper

This commit removes references to js.Wrapper as js.Wrapper has been
removed as part of golang/go#50310.

Fixes #12.

Author: Chan Wen Xu

wasm/reflect_to.go

@@ -31,8 +31,6 @@ func ToJSValue(x interface{}) js.Value {
 	switch x := x.(type) {
 	case js.Value:
 		return x
-	case js.Wrapper:
-		return x.JSValue()
 	case bool, int, int8, int16, int32, int64, uint, uint8, uint16, uint32, uint64, uintptr,
 		unsafe.Pointer, float32, float64, string:
 		return js.ValueOf(x)