Allow to add custom cmake build arguments

[ilyachur]

No description provided.

[codecov]

Codecov Report

Merging #193 (6a54717) into master (89a0e50) will increase coverage by 0.0%.
Report is 3 commits behind head on master.
The diff coverage is 100.0%.

Additional details and impacted files

@@          Coverage Diff           @@
##           master    #193   +/-   ##
======================================
  Coverage    98.5%   98.5%           
======================================
  Files          19      19           
  Lines        1282    1283    +1     
======================================
+ Hits         1263    1264    +1     
  Misses         19      19           

Files	Coverage Δ
autoload/cmake4vim.vim	99.5% <100.0%> (+<0.1%)	⬆️
autoload/utils/cmake.vim	100.0% <100.0%> (ø)
autoload/utils/gen/common.vim	100.0% <100.0%> (ø)
autoload/utils/gen/make.vim	100.0% <100.0%> (ø)
autoload/utils/gen/ninja.vim	100.0% <100.0%> (ø)
autoload/utils/gen/vs.vim	95.4% <100.0%> (ø)

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