Fix bugs

[Leko]

Fixed #104 and fixed #105 and fixed #106 and fixed #103

[codecov-io]

Codecov Report

Merging #107 into master will increase coverage by 0.53%.
The diff coverage is 54.54%.

@@            Coverage Diff             @@
##           master     #107      +/-   ##
==========================================
+ Coverage   43.25%   43.78%   +0.53%     
==========================================
  Files          23       23              
  Lines         504      507       +3     
  Branches       58       59       +1     
==========================================
+ Hits          218      222       +4     
+ Misses        260      259       -1     
  Partials       26       26

Impacted Files	Coverage Δ
packages/hothouse/src/Hosting/index.js	22.22% <0%> (ø)	⬆️
packages/hothouse/src/BlackList.js	100% <100%> (+100%)	⬆️
...es/@hothouse/monorepo-yarn-workspaces/src/index.js	80% <50%> (ø)	⬆️
packages/hothouse/src/Package.js	70% <66.66%> (-0.38%)	⬇️
packages/@hothouse/client-yarn/src/index.js	80.28% <0%> (-2.82%)	⬇️

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