Add in-place `active!`

[codecov[bot]]

Codecov Report

Patch coverage: 90.00% and project coverage change: +0.10 :tada:

Comparison is base (5419b18) 96.68% compared to head (6641cf6) 96.79%.

Additional details and impacted files

```diff @@ Coverage Diff @@ ## main #191 +/- ## ========================================== + Coverage 96.68% 96.79% +0.10% ========================================== Files 7 8 +1 Lines 181 187 +6 ========================================== + Hits 175 181 +6 Misses 6 6 ``` | [Impacted Files](https://app.codecov.io/gh/JuliaSmoothOptimizers/SolverTools.jl/pull/191?src=pr&el=tree&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=JuliaSmoothOptimizers) | Coverage Δ | | |---|---|---| | [src/auxiliary/bounds.jl](https://app.codecov.io/gh/JuliaSmoothOptimizers/SolverTools.jl/pull/191?src=pr&el=tree&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=JuliaSmoothOptimizers#diff-c3JjL2F1eGlsaWFyeS9ib3VuZHMuamw=) | `97.77% <90.00%> (+0.27%)` | :arrow_up: | ... and [1 file with indirect coverage changes](https://app.codecov.io/gh/JuliaSmoothOptimizers/SolverTools.jl/pull/191/indirect-changes?src=pr&el=tree-more&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=JuliaSmoothOptimizers)

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[github-actions[bot]]

Package name	latest	stable
DCISolver.jl
JSOSolvers.jl
Percival.jl

[github-actions[bot]]

Package name	latest	stable
DCISolver.jl
JSOSolvers.jl
Percival.jl

[github-actions[bot]]

Package name	latest	stable
DCISolver.jl
JSOSolvers.jl
Percival.jl