Updates for Julia >= 1.0

[oyamad]

Close #22

[coveralls]

Coverage increased (+0.3%) to 99.471% when pulling 9aba5a6 on julia1.0 into fc450d5 on master.

[codecov-io]

Codecov Report

Merging #23 into master will increase coverage by 0.29%.
The diff coverage is n/a.

@@            Coverage Diff             @@
##           master      #23      +/-   ##
==========================================
+ Coverage   99.18%   99.47%   +0.29%     
==========================================
  Files           3        4       +1     
  Lines         122      189      +67     
==========================================
+ Hits          121      188      +67     
  Misses          1        1              

Impacted Files	Coverage Δ
src/util.jl	100.00% <0.00%> (ø)
src/deferred_acceptance.jl	100.00% <0.00%> (ø)
src/MatchingMarkets.jl	100.00% <0.00%> (ø)
src/matching_tools.jl	98.24% <0.00%> (+0.51%)	⬆️

---

Continue to review full report at Codecov.

Legend - Click here to learn more
Δ = absolute <relative> (impact), ø = not affected, ? = missing data
Powered by Codecov. Last update fc450d5...9aba5a6. Read the comment docs.