fixes for Julia 0.6, dropping support for 0.4

[codecov-io]

Codecov Report

Merging #241 into master will increase coverage by 0.75%. The diff coverage is 88.88%.

@@            Coverage Diff             @@
##           master     #241      +/-   ##
==========================================
+ Coverage   84.26%   85.01%   +0.75%     
==========================================
  Files          24       25       +1     
  Lines        1468     1475       +7     
==========================================
+ Hits         1237     1254      +17     
+ Misses        231      221      -10

Impacted Files	Coverage Δ
src/graph_visit.jl	52.17% <ø> (-2.38%)	:arrow_down:
src/concepts.jl	92.3% <ø> (+50.64%)	:arrow_up:
src/common.jl	76.53% <ø> (ø)	:arrow_up:
src/dijkstra_spath.jl	93.45% <ø> (+0.06%)	:arrow_up:
src/prim_mst.jl	80.95% <ø> (ø)	:arrow_up:
src/a_star_spath.jl	88.88% <100%> (ø)	:arrow_up:
src/maximum_adjacency_visit.jl	88.4% <83.33%> (+1.44%)	:arrow_up:
src/generators.jl	98.52% <0%> (-1.48%)	:arrow_down:
src/show.jl	0% <0%> (ø)	:arrow_up:
... and 3 more

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[dehann]

see #240

[tkelman]

LGTM. Note that const A = B doesn't need @compat unless the left hand side has a type parameter, and take! doesn't need @compat either since it's a normal method rather than a syntax rewrite. But it doesn't hurt to call @compat even when unnecessary.

[dehann]

Thanks, will do more clean-up on later.

And thanks @maxvoxel8

[dpo]

New release? Currently, Metis.jl is broken because of the bug fixed in this PR.

[dehann]

Hi @dpo , will do -- maybe just hang tight for a few days if that is okay please?

[dehann]

Hi, finally tagged new version in METADATA at JuliaLang/METADATA.jl#11202