Bug/skopt0.7.1 compatibility

[codecov[bot]]

Codecov Report

Merging #213 into master will increase coverage by 0.00%. The diff coverage is 100.00%.

@@           Coverage Diff           @@
##           master     #213   +/-   ##
=======================================
  Coverage   94.61%   94.61%           
=======================================
  Files          46       46           
  Lines        4956     4959    +3     
=======================================
+ Hits         4689     4692    +3     
  Misses        267      267           

Impacted Files	Coverage Δ
...yperparameter_hunter/optimization/protocol_core.py	98.00% <100.00%> (ø)
hyperparameter_hunter/space/dimensions.py	99.55% <100.00%> (+<0.01%)	:arrow_up:

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[coveralls]

Pull Request Test Coverage Report for Build 896

• 5 of 5 (100.0%) changed or added relevant lines in 2 files are covered.
• No unchanged relevant lines lost coverage.
• Overall coverage increased (+0.003%) to 94.616%

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Totals
Change from base Build 879:	0.003%
Covered Lines:	4692
Relevant Lines:	4959

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💛 - Coveralls