Exclude portalocker_tests from installed packages

[ignatenkobrain]

No description provided.

[codecov]

Codecov Report

Merging #46 into develop will not change coverage.
The diff coverage is n/a.

@@          Coverage Diff           @@
##           develop    #46   +/-   ##
======================================
  Coverage      100%   100%           
======================================
  Files            6      6           
  Lines          159    159           
  Branches        13     13           
======================================
  Hits           159    159

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[coveralls]

Coverage remained the same at 100.0% when pulling 1e33ac8 on ignatenkobrain:patch-3 into 19193c2 on WoLpH:develop.

[wolph]

Good one, that's an improvement on your earlier pull request indeed :)