When I update Optim to v0.22.0, Plots will be forced to downgrade to v0.29.9. Then I try to update Plots, it changes nothing. After that, I run following and Optim is forced to downgrade to v0.21.0
(@v1.5) pkg> add Plots@v1.6.0
Resolving package versions...
Updating `~/.julia/environments/v1.5/Project.toml`
[e30172f5] ↓ Documenter v0.25.2 ⇒ v0.24.11
[587475ba] ↓ Flux v0.11.1 ⇒ v0.10.4
[891a1506] ↑ GaussianProcesses v0.9.0 ⇒ v0.12.1
[a2cc645c] ↓ GraphPlot v0.4.2 ⇒ v0.3.1
[ee78f7c6] ↑ Makie v0.10.0 ⇒ v0.11.1
[429524aa] ↓ Optim v0.22.0 ⇒ v0.21.0
[91a5bcdd] ↑ Plots v0.29.9 ⇒ v1.6.0
[e88e6eb3] ↓ Zygote v0.5.5 ⇒ v0.4.20
Which package causes the issue here? Thanks in advance.