Our article Implementing a unified solver for nonlinearly constrained optimization was finally published (open access) in Mathematical Programming Computation 
It was a pleasure to meet some of you at JuMP-dev/SIAM OP 
Uno v2.8.0 / UnoSolver.jl v0.3.6 introduces an automatic preset that picks between SQP and barrier based on the problem size. It also enables dynamic loading for the HSL linear solvers and a new interface to HSL MA86.
@amontoison and I also published a software article in JOSS 
Uno v2.9.0 / UnoSolver.jl v0.3.7 is out with substantial improvements to its barrier implementation. It now solves 45/47 instances on the Mittelmann benchmark in about the same time as IPOPT