limit memory peak in invariant_vectors

[kalmarek]

@piotrmizerka

[codecov[bot]]

Codecov Report

Patch coverage: 98.24% and project coverage change: +0.36% :tada:

Comparison is base (860506b) 87.45% compared to head (01830af) 87.82%.

Additional details and impacted files

```diff @@ Coverage Diff @@ ## master #60 +/- ## ========================================== + Coverage 87.45% 87.82% +0.36% ========================================== Files 20 20 Lines 1299 1322 +23 ========================================== + Hits 1136 1161 +25 + Misses 163 161 -2 ``` | Flag | Coverage Δ | | |---|---|---| | unittests | `87.82% <98.24%> (+0.36%)` | :arrow_up: | Flags with carried forward coverage won't be shown. [Click here](https://docs.codecov.io/docs/carryforward-flags?utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=Marek+Kaluba#carryforward-flags-in-the-pull-request-comment) to find out more. | [Files Changed](https://app.codecov.io/gh/kalmarek/SymbolicWedderburn.jl/pull/60?src=pr&el=tree&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=Marek+Kaluba) | Coverage Δ | | |---|---|---| | [src/wedderburn\_decomposition.jl](https://app.codecov.io/gh/kalmarek/SymbolicWedderburn.jl/pull/60?src=pr&el=tree&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=Marek+Kaluba#diff-c3JjL3dlZGRlcmJ1cm5fZGVjb21wb3NpdGlvbi5qbA==) | `87.80% <98.24%> (+4.80%)` | :arrow_up: |

:umbrella: View full report in Codecov by Sentry.
:loudspeaker: Have feedback on the report? Share it here.