update MOI to 1, fix error in classicalquantum example

[chriscoey]

replaces #806
@joaquimg

[codecov]

Codecov Report

Merging #811 (898bf22) into master (a70d804) will increase coverage by 0.04%.
The diff coverage is n/a.

@@            Coverage Diff             @@
##           master     #811      +/-   ##
==========================================
+ Coverage   96.66%   96.71%   +0.04%     
==========================================
  Files          54       54              
  Lines        8374     8374              
==========================================
+ Hits         8095     8099       +4     
+ Misses        279      275       -4     

Impacted Files	Coverage Δ
src/linearalgebra/dense.jl	68.05% <0.00%> (+5.55%)	⬆️

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