lib: lint fixes

[mstoykov]

Part of #769

[codecov-commenter]

Codecov Report

Attention: 4 lines in your changes are missing coverage. Please review.

Comparison is base (ef1f214) 72.82% compared to head (33d769e) 72.96%.
Report is 1 commits behind head on master.

❗ Current head 33d769e differs from pull request most recent head c9b2c1c. Consider uploading reports for the commit c9b2c1c to get more accurate results

Files	Patch %	Lines
lib/archive.go	60.00%	0 Missing and 2 partials ⚠️
lib/executor/externally_controlled.go	33.33%	1 Missing and 1 partial ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##           master    #3561      +/-   ##
==========================================
+ Coverage   72.82%   72.96%   +0.14%     
==========================================
  Files         278      280       +2     
  Lines       20947    20946       -1     
==========================================
+ Hits        15254    15284      +30     
+ Misses       4715     4692      -23     
+ Partials      978      970       -8     

Flag	Coverage Δ
macos	72.89% <82.60%> (?)
ubuntu	72.92% <82.60%> (?)
windows	72.82% <82.60%> (+<0.01%)	⬆️

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