src: don't use deprecated v8::Template::Set()

See [0] and [1]: starting with node.js v6, setting non-primitive values
on FunctionTemplate and ObjectTemplate instances is discouraged; v7 will
downright disallow it. Update the code base.

[0] nodejs/node#6216
[1] nodejs/node#6228

src/onig-scanner.cc

@@ -7,8 +7,8 @@ void OnigScanner::Init(Local<Object> target) {
   Local<FunctionTemplate> tpl = Nan::New<FunctionTemplate>(OnigScanner::New);
   tpl->SetClassName(Nan::New<String>("OnigScanner").ToLocalChecked());
   tpl->InstanceTemplate()->SetInternalFieldCount(1);
-  tpl->PrototypeTemplate()->Set(Nan::New<String>("_findNextMatch").ToLocalChecked(), Nan::New<FunctionTemplate>(OnigScanner::FindNextMatch)->GetFunction());
-  tpl->PrototypeTemplate()->Set(Nan::New<String>("_findNextMatchSync").ToLocalChecked(), Nan::New<FunctionTemplate>(OnigScanner::FindNextMatchSync)->GetFunction());
+  tpl->PrototypeTemplate()->Set(Nan::New<String>("_findNextMatch").ToLocalChecked(), Nan::New<FunctionTemplate>(OnigScanner::FindNextMatch));
+  tpl->PrototypeTemplate()->Set(Nan::New<String>("_findNextMatchSync").ToLocalChecked(), Nan::New<FunctionTemplate>(OnigScanner::FindNextMatchSync));
 
   target->Set(Nan::New<String>("OnigScanner").ToLocalChecked(), tpl->GetFunction());
 }