0.7 compat

[oyamad]

(Some tests still fail for 0.7.)

[codecov-io]

Codecov Report

Merging #83 into master will decrease coverage by 0.21%.
The diff coverage is 88.23%.

@@            Coverage Diff             @@
##           master      #83      +/-   ##
==========================================
- Coverage   96.43%   96.22%   -0.22%     
==========================================
  Files           6        6              
  Lines         449      450       +1     
==========================================
  Hits          433      433              
- Misses         16       17       +1

Impacted Files	Coverage Δ
src/pure_nash.jl	100% <100%> (ø)	⬆️
src/support_enumeration.jl	100% <100%> (ø)	⬆️
src/repeated_game.jl	91.3% <100%> (ø)	⬆️
src/random.jl	100% <100%> (ø)	⬆️
src/generators/bimatrix_generators.jl	100% <100%> (ø)	⬆️
src/normal_form_game.jl	94.06% <66.66%> (-0.81%)	⬇️

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[coveralls]

Coverage decreased (-0.2%) to 96.222% when pulling f4d0043 on 0.7-compat into 9835700 on master.