Fix for #10

[pakk-minidose]

Closes #10 Although I have not tried to reproduce the issue, I think that it should also close #9.

Basically, the custom copyto! was replaced by Zygote's built in functions (plus some other changes).

If this PR is approved, documentation on the front page will need a change.

[codecov[bot]]

Codecov Report

Merging #13 (f5bbe96) into master (f88409a) will decrease coverage by 1.17%. The diff coverage is 100.00%.

:exclamation: Current head f5bbe96 differs from pull request most recent head c95bc66. Consider uploading reports for the commit c95bc66 to get more accurate results

@@            Coverage Diff             @@
##           master      #13      +/-   ##
==========================================
- Coverage   96.58%   95.40%   -1.18%     
==========================================
  Files           2        2              
  Lines         117       87      -30     
==========================================
- Hits          113       83      -30     
  Misses          4        4              

Flag	Coverage Δ
unittests	95.40% <100.00%> (-1.18%)	:arrow_down:

Flags with carried forward coverage won't be shown. Click here to find out more.

Impacted Files	Coverage Δ
src/FluxOptTools.jl	90.47% <100.00%> (-3.97%)	:arrow_down:

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[pakk-minidose]

The codecov seems to have indirectly decreased. Is it a reason for the failing check?

[baggepinnen]

The codecov is fine, a lot of hits were removed which decreased the percentage but that's no problem. If we update the description in the Readme as well this will be good to merge?

[baggepinnen]

Cool! Thanks for your contribution :)

[pakk-minidose]

I was happy to help ;-)