work on Rect transform

[codecov[bot]]

Codecov Report

Base: 96.20% // Head: 96.22% // Increases project coverage by +0.02% :tada:

Coverage data is based on head (866bdd2) compared to base (f3abe8d). Patch coverage: 97.77% of modified lines in pull request are covered.

Additional details and impacted files

```diff @@ Coverage Diff @@ ## master #133 +/- ## ========================================== + Coverage 96.20% 96.22% +0.02% ========================================== Files 5 5 Lines 816 848 +32 ========================================== + Hits 785 816 +31 - Misses 31 32 +1 ``` | [Impacted Files](https://codecov.io/gh/JuliaApproximation/MultivariateOrthogonalPolynomials.jl/pull/133?src=pr&el=tree&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=JuliaApproximation) | Coverage Δ | | |---|---|---| | [src/rect.jl](https://codecov.io/gh/JuliaApproximation/MultivariateOrthogonalPolynomials.jl/pull/133/diff?src=pr&el=tree&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=JuliaApproximation#diff-c3JjL3JlY3Quamw=) | `94.44% <96.77%> (+2.77%)` | :arrow_up: | | [src/disk.jl](https://codecov.io/gh/JuliaApproximation/MultivariateOrthogonalPolynomials.jl/pull/133/diff?src=pr&el=tree&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=JuliaApproximation#diff-c3JjL2Rpc2suamw=) | `97.70% <100.00%> (+0.05%)` | :arrow_up: | | [src/triangle.jl](https://codecov.io/gh/JuliaApproximation/MultivariateOrthogonalPolynomials.jl/pull/133/diff?src=pr&el=tree&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=JuliaApproximation#diff-c3JjL3RyaWFuZ2xlLmps) | `96.29% <100.00%> (-0.02%)` | :arrow_down: | Help us with your feedback. Take ten seconds to tell us [how you rate us](https://about.codecov.io/nps?utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=JuliaApproximation). Have a feature suggestion? [Share it here.](https://app.codecov.io/gh/feedback/?utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=JuliaApproximation)

:umbrella: View full report at Codecov.
:loudspeaker: Do you have feedback about the report comment? Let us know in this issue.