Make non-accumulators local

[codecov[bot]]

Codecov Report

Attention: Patch coverage is 95.16129% with 3 lines in your changes missing coverage. Please review.

Project coverage is 95.03%. Comparing base (87f4c39) to head (edb9a63). Report is 4 commits behind head on master.

Files	Patch %	Lines
src/macro.jl	95.08%	3 Missing :warning:

Additional details and impacted files

```diff @@ Coverage Diff @@ ## master #125 +/- ## ========================================== - Coverage 95.04% 95.03% -0.01% ========================================== Files 5 5 Lines 706 766 +60 ========================================== + Hits 671 728 +57 - Misses 35 38 +3 ``` | [Flag](https://app.codecov.io/gh/JuliaFolds/FLoops.jl/pull/125/flags?src=pr&el=flags&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=JuliaFolds) | Coverage Δ | | |---|---|---| | [Pkg.test](https://app.codecov.io/gh/JuliaFolds/FLoops.jl/pull/125/flags?src=pr&el=flag&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=JuliaFolds) | `94.68% <95.08%> (+0.01%)` | :arrow_up: | | [Run.test](https://app.codecov.io/gh/JuliaFolds/FLoops.jl/pull/125/flags?src=pr&el=flag&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=JuliaFolds) | `87.80% <88.70%> (+0.04%)` | :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=JuliaFolds#carryforward-flags-in-the-pull-request-comment) to find out more.

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