* Include <cstdint> is required because of uintptr_t

* move `generateVersion` to common code

* on Linux with Chinese language chosen in interface this test fails

* this combination leads to NaN values when height is overridden

* test that empty font still have a meaningful metrics, because FontStyle may rely on it

* simplify test

* check that we don't put NaN in skia

this value might be used as part of key in paragraph cache, which may lead to UB atm