Failling to build LTS versions with ICU 59

When trying to build either Argon or Boron with ICU 59.x, it fails with the following error:

../deps/v8/src/runtime/runtime-i18n.cc: In function ‘v8::internal::Object* v8::internal::__RT_impl_Runtime_StringNormalize(v8::internal::Arguments, v8::internal::Isolate*)’:
../deps/v8/src/runtime/runtime-i18n.cc:588:8: error: ‘icu::Normalizer’ has not been declared
   icu::Normalizer::normalize(u_value, normalizationForms[form_id], 0, result,
        ^~~~~~~~~~

I’m not sure how to fix this, and if other changes are required, but this is an issue for ArchLinux packages.