Remove julia-06

[matbesancon]

Added a Project.toml file with compatible UUID and corresponding dependencies, removed use of Compat

[blegat]

There are also VERSION checks to remove:

➜  MathOptInterface git:(master) ✗ grep VERSION * -r
src/functions.jl:@static if VERSION >= v"0.7-"
src/functions.jl:if VERSION < v"0.7-"
src/functions.jl:        if VERSION >= v"0.7-"
src/functions.jl:        if VERSION >= v"0.7-"
src/Utilities/functions.jl:    @static if VERSION >= v"0.7-"
src/Utilities/functions.jl:    @static if VERSION >= v"0.7-"
src/Utilities/functions.jl:@static if VERSION >= v"0.7-"
src/Utilities/model.jl:if VERSION >= v"0.7.0-DEV.2813"
src/Utilities/parser.jl:if VERSION > v"0.7-"
src/Utilities/model.jl.mem:        - if VERSION >= v"0.7.0-DEV.2813"
src/attributes.jl:@static if VERSION >= v"0.7-"
src/Test/modellike.jl:        if VERSION < v"0.7-"
src/Test/modellike.jl:        if VERSION < v"0.7-"
src/Bridges/quadtosocbridge.jl:        @static if VERSION >= v"0.7-"
src/MathOptInterface.jl:VERSION < v"0.7.0-beta2.199" && __precompile__()
src/MathOptInterface.jl:@static if VERSION >= v"0.7-"
test/bridge.jl:        if VERSION < v"0.7-"
test/bridge.jl:        if VERSION < v"0.7-"
test/bridge.jl:        if VERSION < v"0.7-"
test/Utilities/cachingoptimizer.jl:    if VERSION < v"0.7"
test/Utilities/mockoptimizer.jl:    if VERSION < v"0.7-"
test/Utilities/mockoptimizer.jl:    if VERSION < v"0.7-"
test/attributes.jl:        if VERSION < v"0.7-"

[codecov-io]

Codecov Report

Merging #714 into master will decrease coverage by 2.81%.
The diff coverage is 80.95%.

@@            Coverage Diff             @@
##           master     #714      +/-   ##
==========================================
- Coverage    95.2%   92.39%   -2.82%     
==========================================
  Files          54       54              
  Lines        5690     5652      -38     
==========================================
- Hits         5417     5222     -195     
- Misses        273      430     +157

Impacted Files	Coverage Δ
src/Test/Test.jl	100% <ø> (ø)	⬆️
src/Utilities/Utilities.jl	100% <ø> (ø)	⬆️
src/Utilities/model.jl	93.72% <ø> (-6.28%)	⬇️
src/Bridges/Bridges.jl	100% <ø> (ø)	⬆️
src/Test/contconic.jl	99% <ø> (-1%)	⬇️
src/Bridges/intervalbridge.jl	80.55% <0%> (-5.56%)	⬇️
src/Bridges/squarepsdbridge.jl	91.93% <0%> (-6.46%)	⬇️
src/Utilities/copy.jl	91.08% <0%> (-1.99%)	⬇️
src/Bridges/quadtosocbridge.jl	90.47% <100%> (-6.5%)	⬇️
src/Utilities/functions.jl	91.27% <100%> (-4.13%)	⬇️
... and 44 more

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[matbesancon]

Not sure codecov is very meaningful here

[matbesancon]

Fixes #661

[blegat]

LGTM, thanks !

[blegat]

Not sure codecov is very meaningful here

Not it's know that dropping Julia v0.6 creates a coverage drop: JuliaCI/Coverage.jl#187