Promote div and / in the same way

[hersle]

The current operation promotion falls back to 0 / 1 for /, but div(0, 0) for div, giving the DivideError in #240.
This fixes that.

[odow]

Nice! Could you add a new test for this to the bottom of https://github.com/jump-dev/MutableArithmetics.jl/blob/master/test/interface.jl?

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 91.95%. Comparing base (5e901e1) to head (d2c8341).

Additional details and impacted files

@@            Coverage Diff             @@
##           master     #270      +/-   ##
==========================================
+ Coverage   91.71%   91.95%   +0.23%     
==========================================
  Files          23       23              
  Lines        2173     2200      +27     
==========================================
+ Hits         1993     2023      +30     
+ Misses        180      177       -3     

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[hersle]

I added a test 😃

[odow]

The formatter is very particular 😄 but it does help unify the code across all of jump-dev.

[hersle]

That's alright 😄