Catch ct.CanteraError when the cvodes integrator fails in sensitivity analysis

[xMestas]

Fixes #64

[codecov-io]

Codecov Report

Merging #65 into master will decrease coverage by 0.13%.
The diff coverage is 40%.

@@            Coverage Diff             @@
##           master      #65      +/-   ##
==========================================
- Coverage   66.98%   66.85%   -0.14%     
==========================================
  Files          12       12              
  Lines        1266     1270       +4     
  Branches      294      294              
==========================================
+ Hits          848      849       +1     
- Misses        316      319       +3     
  Partials      102      102

Impacted Files	Coverage Δ
pymars/sensitivity_analysis.py	70.58% <40%> (-2.85%)	⬇️

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