www/node8: unbreak with ICU 61

../src/node_i18n.cc:526:12: error: use of undeclared identifier 'TimeZone'; did you mean 'icu::TimeZone'?

return TimeZone::getTZDataVersion(*status);
       ^~~~~~~~
       icu::TimeZone

/usr/local/include/unicode/timezone.h:131:18: note: 'icu::TimeZone' declared here
class U_I18N_API TimeZone : public UObject {

^

https://ssl.icu-project.org/trac/changeset/40705

PR: 227042
Reported by: antoine (via exp-run)
Obtained from: upstream