Fix requirements

[rdeits]

No description provided.

[coveralls]

Coverage remained the same at 75.743% when pulling 3850fe2 on rdeits:no-compat into 34d3fbd on JuliaPolyhedra:master.

[rdeits]

@blegat are you OK with this? It removes all the Pkg.checkout()s from appveyor and travis, and everything seems to be working nicely 😄

[codecov]

Codecov Report

Merging #17 into master will not change coverage.
The diff coverage is n/a.

@@           Coverage Diff           @@
##           master      #17   +/-   ##
=======================================
  Coverage   75.74%   75.74%           
=======================================
  Files          11       11           
  Lines         808      808           
=======================================
  Hits          612      612           
  Misses        196      196

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[blegat]

Yep :) I have updated the release on METADATA