use Nan::ForceSet to avoid v8 deprecation issue

src/database.cc

@@ -130,8 +130,8 @@ NAN_METHOD(Database::New) {
     Database* db = new Database();
     db->Wrap(info.This());
 
-    info.This()->ForceSet(Nan::New("filename").ToLocalChecked(), info[0].As<String>(), ReadOnly);
-    info.This()->ForceSet(Nan::New("mode").ToLocalChecked(), Nan::New(mode), ReadOnly);
+    Nan::ForceSet(info.This(), Nan::New("filename").ToLocalChecked(), info[0].As<String>(), ReadOnly);
+    Nan::ForceSet(info.This(), Nan::New("mode").ToLocalChecked(), Nan::New(mode), ReadOnly);
 
     // Start opening the database.
     OpenBaton* baton = new OpenBaton(db, callback, *filename, mode);

src/statement.cc

@@ -100,7 +100,7 @@ NAN_METHOD(Statement::New) {
     Database* db = Nan::ObjectWrap::Unwrap<Database>(info[0].As<Object>());
     Local<String> sql = Local<String>::Cast(info[1]);
 
-    info.This()->ForceSet(Nan::New("sql").ToLocalChecked(), sql, ReadOnly);
+    Nan::ForceSet(info.This(),Nan::New("sql").ToLocalChecked(), sql, ReadOnly);
 
     Statement* stmt = new Statement(db);
     stmt->Wrap(info.This());