work on grid for Zernike

[codecov[bot]]

Codecov Report

Base: 96.22% // Head: 96.19% // Decreases project coverage by -0.03% :warning:

Coverage data is based on head (4668ca6) compared to base (a0c71e1). Patch coverage: 100.00% of modified lines in pull request are covered.

Additional details and impacted files

```diff @@ Coverage Diff @@ ## master #135 +/- ## ========================================== - Coverage 96.22% 96.19% -0.04% ========================================== Files 5 5 Lines 848 841 -7 ========================================== - Hits 816 809 -7 Misses 32 32 ``` | [Impacted Files](https://codecov.io/gh/JuliaApproximation/MultivariateOrthogonalPolynomials.jl/pull/135?src=pr&el=tree&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=JuliaApproximation) | Coverage Δ | | |---|---|---| | [src/disk.jl](https://codecov.io/gh/JuliaApproximation/MultivariateOrthogonalPolynomials.jl/pull/135/diff?src=pr&el=tree&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=JuliaApproximation#diff-c3JjL2Rpc2suamw=) | `97.64% <100.00%> (-0.06%)` | :arrow_down: | | [src/rect.jl](https://codecov.io/gh/JuliaApproximation/MultivariateOrthogonalPolynomials.jl/pull/135/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% <100.00%> (ø)` | | | [src/triangle.jl](https://codecov.io/gh/JuliaApproximation/MultivariateOrthogonalPolynomials.jl/pull/135/diff?src=pr&el=tree&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=JuliaApproximation#diff-c3JjL3RyaWFuZ2xlLmps) | `96.26% <100.00%> (-0.03%)` | :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)

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