Changed is_windows to Sys.iswindows

[danimad]

Changed is_windows to Sys.iswindows because it was deprecated with JuliaLang/julia#22182

[ranjanan]

You've got to update travis and appveyor to test only from v0.7

[danimad]

@ranjanan Thanks! But should I just updated it so they test v0.7 and up, or should I try to make it compatible with older versions somehow?
I'm just getting into Julia, and wanted to try out Queryverse with v1.0, and now I try to fix the errors on my local machines. Maybe it was a bit presumptuous to do PLs until I learned more about Julia. 😄

[codecov-io]

Codecov Report

Merging #43 into master will increase coverage by 90.9%.
The diff coverage is n/a.

@@           Coverage Diff            @@
##           master    #43      +/-   ##
========================================
+ Coverage    9.09%   100%   +90.9%     
========================================
  Files           2      1       -1     
  Lines          11      1      -10     
========================================
  Hits            1      1              
+ Misses         10      0      -10

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[ranjanan]

I think dropping until v0.6 is fine. Also, have you seen #42? It may make sense to just merge efforts there.

[danimad]

Not yet, but thanks for showing it to me. I played around more and I saw that these things should also be changed. I look at #42 maybe I can help there.

[omus]

#42 is now merged. Note that Julia 1.0 doesn't quite work yet.