Update ArrayBuffer::was_detached to not use OpenHandle (denoland#…

…1126)

In denoland#1103, the `ArrayBuffer::was_detached` method was added to rusty_v8
to fill a gap in the C++ API, and it was implemented using the
internal `v8::Utils::OpenHandle`. Since then, a `WasDetached` method
was added to `ArrayBuffer` in V8 10.9. This PR updates the
implementation to use that.

src/binding.cc

@@ -832,7 +832,7 @@ bool v8__ArrayBuffer__IsDetachable(const v8::ArrayBuffer& self) {
 }
 
 bool v8__ArrayBuffer__WasDetached(const v8::ArrayBuffer& self) {
- return v8::Utils::OpenHandle(&self)->was_detached();
+ return ptr_to_local(&self)->WasDetached();
 }
 
 void v8__ArrayBuffer__SetDetachKey(const v8::ArrayBuffer& self,