CWE-195 in ExternalMemoryAccounter::Increase()

V8's `ExternalMemoryAccounter::Increase()` expects an unsigned `size_t` argument, but a signed `ssize_t` which in some cases results in garbage collection to happen during garbage collection. Here's a simplified version of what happens (full backtrace has been attached in the issue):

v8::internal::Heap::CollectAllGarbage
GC triggered by as negative integer passed to
v8::ExternalMemoryAccounter::Increase(v8::Isolate*, unsigned int)
called by
node::(anonymous namespace)::CompressionStream<node::(anonymous namespace)::ZlibContext>::Close()
during destruction of
node::(anonymous …