Added fixes for Julia 1.0

[simonschoelly]

Most of the stuff works, but the package Clp.jl is not yet ready for version 1.0. Therefore the tests fail and mincost_flow does not work yet.

Should also remove most of the warnings in #18

[matbesancon]

oh wonderful thanks!
For the parametric functions I'm not sure SimpleTraits.jl supports the where syntax

[matbesancon]

Also, I think we can change the travis config:

julia:
  - 0.7
  - 1.0
  - nightly

matrix:
  allow_failures:
- julia: nightly

[simonschoelly]

I changed the travis config. There is also appveyor config that defaults to version 0.6 but I'm not familiar with that.
SimpleTraits does support the where syntax, you just have to be a bit careful when you have multiple arguments in the where clause.

[coveralls]

Coverage remained the same at 100.0% when pulling dd24242 on simonschoelly:fixes_for_v1.0 into c64661c on JuliaGraphs:master.

[matbesancon]

To update appveyor if you can: https://github.com/JuliaCI/Appveyor.jl
The readme example is up to date for 1.0, copy-pasting should just work, uncomment the nightly fail allowed and we're god

[codecov]

Codecov Report

Merging #19 into master will not change coverage.
The diff coverage is 100%.

@@          Coverage Diff           @@
##           master    #19    +/-   ##
======================================
  Coverage     100%   100%            
======================================
  Files          11     10     -1     
  Lines         419    280   -139     
======================================
- Hits          419    280   -139

Impacted Files	Coverage Δ
src/ext_multiroute_flow.jl	100% <ø> (ø)	⬆️
src/push_relabel.jl	100% <ø> (ø)	⬆️
src/dinic.jl	100% <100%> (ø)	⬆️
src/maximum_flow.jl	100% <100%> (ø)	⬆️
src/boykov_kolmogorov.jl	100% <100%> (ø)	⬆️
src/edmonds_karp.jl	100% <100%> (ø)	⬆️
src/mincost.jl	100% <0%> (ø)	⬆️
... and 6 more

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[simonschoelly]

Appveyor is running now but Windows has problems with clp on all versions. The other tests all pass:
https://ci.appveyor.com/project/simonschoelly/lightgraphsflows-jl/build/1.0.10

[matbesancon]

yes clp is supposedly good on 0.7, not sure about 1.0 they didn't put it in their CI scripts, I'll PR them for it

[matbesancon]

jump-dev/Clp.jl#32

[juliohm]

Thank you @simonschoelly for your work. What is the status?

[simonschoelly]

Until Clp.jl and Cbc.jl, which is a dependency for the former, work on 1.0, the tests can't pass.

See jump-dev/Clp.jl#31 and jump-dev/Cbc.jl#54.

[simonschoelly]

Clp runs on Julia v1.0 now, so this PR could probably be merged.

[matbesancon]

Wonderful, merging as soon as CI passes, thanks @simonschoelly !