core: ensure cursor is not hidden in case of failures

[pavdmyt]

No description provided.

[codecov-commenter]

Codecov Report

Merging #152 (aaa58db) into master (42ca0f1) will increase coverage by 0.60%.
The diff coverage is 100.00%.

@@            Coverage Diff             @@
##           master     #152      +/-   ##
==========================================
+ Coverage   96.18%   96.79%   +0.60%     
==========================================
  Files           7        7              
  Lines         341      343       +2     
==========================================
+ Hits          328      332       +4     
+ Misses         13       11       -2     

Impacted Files	Coverage Δ
yaspin/core.py	96.35% <100.00%> (+0.69%)	⬆️

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