Update to MOI v0.9

[blegat]

See jump-dev/MathOptInterface.jl#736

Closes #42

[codecov-io]

Codecov Report

Merging #41 into master will increase coverage by 1.88%.
The diff coverage is 83.44%.

@@            Coverage Diff             @@
##           master      #41      +/-   ##
==========================================
+ Coverage   67.94%   69.83%   +1.88%     
==========================================
  Files           8       10       +2     
  Lines         443      547     +104     
==========================================
+ Hits          301      382      +81     
- Misses        142      165      +23

Impacted Files	Coverage Δ
src/blockmat.h.jl	72.72% <ø> (ø)	⬆️
src/CSDP.jl	100% <ø> (ø)
src/options.jl	100% <100%> (ø)	⬆️
src/blockmat.jl	82.67% <100%> (-1.05%)	⬇️
src/MPB_wrapper.jl	61.7% <100%> (+3.56%)	⬆️
src/blockdiag.jl	80% <80%> (ø)
src/MOI_wrapper.jl	75% <81.89%> (+3.57%)	⬆️
... and 2 more

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