Add codecov token

[devmotion]

This PR fixes codecov integration (see the discussion in #128). @DilumAluthge added an orgwide codecov token for JuliaMath (AFAIK) and hence this should work without any additional changes or new Github secrets in AbstractFFTs.

Closes #128.

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Comparison is base (41f58b5) 94.83% compared to head (5a4636e) 94.83%.
Report is 5 commits behind head on master.

Additional details and impacted files

@@           Coverage Diff           @@
##           master     #129   +/-   ##
=======================================
  Coverage   94.83%   94.83%           
=======================================
  Files           5        5           
  Lines         445      445           
=======================================
  Hits          422      422           
  Misses         23       23           

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[jishnub]

Hijacking this thread: it would be great to add similar org-level tokens for other orgs like JuliaArrays and JuliaLinearAlgebra. I wonder if @DilumAluthge has admin access to these?

[DilumAluthge]

I can take care of JuliaLinearAlgebra. I don't have access to JuliaArrays, but I'll reach out to some of the owners of that org.

[jishnub]

I've managed to get both of these done after Viral gave me the permission. Thanks a lot anyway!