Help needed with libdparse PR

[RazvanN]

Hello everyone!

I have made a PR to add alias assign recognition in libdparse 
[1]. This is done to unblock a series of PRs (e.g [2]) in phobos 
that currently are blocked by the style checker (that uses 
libdparse). However, mt PR is blocked because libdparse uses an 
old version of stdx.allocator. Is there anyone who could provide 
pointers on how to bump the version of stdx.allocator to better 
one?

Cheers,
RazvanN

[1] https://github.com/dlang-community/libdparse/pull/441
[2] https://github.com/dlang/phobos/pull/8047