Use newer version of CxxWrap

[schillic]

Currently, SDPA fails on PkgEval:

PkgEval run

The culprit seems to be CxxWrap. However, CxxWrap alone runs fine:

PkgEval run

I think simply supporting a newer version (v0.16 or maybe even only v0.15) would solve that.
On this note, I suggest to reactivate CompatHelper.

[odow]

This is never trivial because we need to rebuild SDPA_jll etc:
JuliaPackaging/Yggdrasil#9694

I dislike CompatHelper. People should release fewer breaking changes.