Use matlab_round instead of round to fix precompilation issues

[Tortar]

Precompilation failed before this:

julia> using BeforeIT
Precompiling BeforeIT...
Info Given BeforeIT was explicitly requested, output will be shown live 
WARNING: Method definition round(Any) in module Base at rounding.jl:472 overwritten in module BeforeIT at /home/bob/.julia/dev/BeforeIT/src/utils/positive.jl:80.
ERROR: Method overwriting is not permitted during Module precompilation. Use `__precompile__(false)` to opt-out of precompilation.
  ? BeforeIT
[ Info: Precompiling BeforeIT [ca9fcad7-41d0-4f76-b1e5-366c28bce52e] 
WARNING: Method definition round(Any) in module Base at rounding.jl:472 overwritten in module BeforeIT at /home/bob/.julia/dev/BeforeIT/src/utils/positive.jl:80.
ERROR: Method overwriting is not permitted during Module precompilation. Use `__precompile__(false)` to opt-out of precompilation.
┌ Info: Skipping precompilation due to precompilable error. Importing BeforeIT [ca9fcad7-41d0-4f76-b1e5-366c28bce52e].
└   exception = Error when precompiling module, potentially caused by a __precompile__(false) declaration in the module.

p.s. Very Cool Project!!!

[AldoGl]

Thank you @Tortar for your fix! This seems correct to me. @Devetak what do you think?

By the way, that part of the code is highly experimental and untested. If using it you end up improving quality/modularity please don't hesitate to push further changes :)

[Devetak]

Looks good, thank you for fixing it. I think we can squash and merge.

Btw @Tortar any insight why we never spotted this error? Do you have any special flags?

[Tortar]

I checked now, seems like this warning is present only in 1.11, which is kind of strange, at the same time this is piracy so it should be good to fix it

[AldoGl]

Perfect guys, I am rebasing and merging now!

[AldoGl]

Thanks @Tortar, I added you to the list of contributors. Once again, don't hesitate to push more changes.